feat: D81 — dashboard-data quota_v2 shape + models-registry schema_version (Phase 5) (#53)

Authority citations (required per CLAUDE.md § Hard requirements):
  1. ADR 0012 D81 — the D-day being implemented (Phase 5 charter, audit-query
     + dashboard-data extension row in § D-day table)
  2. ADR 0013 Rule 5 — schema_version in models-registry.json mandate. D80
     used a local constant QUOTA_SCHEMA_VERSION = '2026-05-26' (reviewer nit
     #4 at PR #52). D81 folds in Rule 5 compliance: adds quota_probe.schema_version
     to models-registry.json and has anthropic.mjs read from there with the
     constant as fallback via _resolveSchemaVersion().
  3. ADR 0008 — the audit-query design being amended (Amendment 1 added at D81
     to docs/adr/0008-dashboard-and-audit-query.md documenting: quota_probe in
     registry, aggregateProviderQuota() API shape, quota_v2 key, deprecation
     timeline for legacy quota key).
  4. D80 PR #52 (commit 82d2e1c) — producer of the quotaStatus() shape that
     D81 normalizes. The 13-field anthropic-ratelimit-unified-* shape from
     _parseRateLimitHeaders() is consumed by _normalizeAnthropicQuota() here.

Changes (A–G per D81 spec):

A. models-registry.json — new top-level quota_probe key
   - quota_probe.schema_version = '2026-05-26'
   - quota_probe.anthropic.{ source, endpoint, fields_pinned[13] }
   - fields_pinned is load-bearing for drift detection (ADR 0013 Rule 5)

B. lib/providers/anthropic.mjs — _resolveSchemaVersion() helper
   - Reads quota_probe.schema_version from modelsRegistryRaw at call time
   - Falls back to QUOTA_SCHEMA_VERSION constant if registry field absent
   - quotaStatus() now uses _resolveSchemaVersion() instead of raw constant

C. lib/audit-query.mjs — aggregateProviderQuota() export
   - Normalizes per-provider quotaStatus() returns to ProviderQuotaEntry shape
   - Live → { status:'live', utilization, reset, representative_claim, … }
   - Stale → { status:'stale', … }
   - null return → { status:'unavailable', reason:'no public quota api or probe disabled' }
   - throw → { status:'unavailable', reason:<error.message> }
   - getQuotaStatus injection point for full test isolation (D81 §F)

D. server.mjs handleManagementDashboardData — quota_v2 added
   - Calls auditAggregateProviderQuota({ providers: loadedProviders })
   - Both legacy quota (backwards compat) and quota_v2 in response
   - Graceful degradation: quota_v2 failure → warn log + empty array, rest of
     payload unaffected

E. server.mjs handleManagementQuota — quota_v2 added (mirrors D)

F. test-features.mjs — Suite 37 (7 new tests)
   - 37a: live shape normalization (status=live, utilization, reset, etc.)
   - 37b: stale shape (status=stale)
   - 37c: null returns → unavailable entries
   - 37d: throw path → unavailable with reason
   - 37e: mixed providers (live + unavailable)
   - 37f: getQuotaStatus injection verified
   - 37g: models-registry.json has quota_probe.schema_version + 13 fields_pinned

G. docs/adr/0008-dashboard-and-audit-query.md — Amendment 1 added

Test delta: 720 → 727 (+7), 0 failures.

Live quota_v2 JSON sample (illustrative — probe is opt-in per ADR 0013 Rule 4;
real values require quota_probe_enabled:true + valid OAuth credentials):

  GET /v0/management/dashboard-data (owner-only)
  {
    "quota_v2": [
      {
        "provider": "anthropic",
        "status": "live",
        "schema_version": "2026-05-26",
        "last_fresh_at": 1748300000000,
        "utilization": { "5h": 0.49, "7d": 0.31 },
        "reset": { "5h": 1748290000, "7d": 1748500000, "overall": 1748300000, "overage": null },
        "representative_claim": "five_hour",
        "fallback_percentage": 0.5,
        "overage": { "status": "rejected", "disabled_reason": "org_level_disabled_until" },
        "raw_available": true
      },
      {
        "provider": "openai",
        "status": "unavailable",
        "reason": "no public quota api or probe disabled",
        "schema_version": null,
        "last_fresh_at": null,
        "utilization": null,
        "reset": null,
        "representative_claim": null,
        "fallback_percentage": null,
        "overage": null,
        "raw_available": false
      }
    ]
  }

When probe is disabled (default), anthropic entry also returns unavailable:
  { "provider": "anthropic", "status": "unavailable",
    "reason": "no public quota api or probe disabled", ... }

NOT modified: dashboard.html (D82), codex.mjs, mistral.mjs, any quotaStatus()
return shape from anthropic.mjs (D80 contract unchanged — normalization is in
the new audit-query layer only).

Co-authored-by: dtzp555 <dtzp555@gmail.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/audit-query.mjs

@@ -443,6 +443,170 @@ export function spendTrendDaily({ days, olpHome, logEvent, _nowFn } = {}) {
   });
 }
 
+/**
+ * Normalize a single quotaStatus() return value from the anthropic plugin into
+ * the dashboard-friendly shape (D81 / ADR 0008 Amendment).
+ * Provider-specific: called only for 'anthropic'. Returns null if the raw
+ * shape is absent or malformed.
+ *
+ * @internal — used by aggregateProviderQuota()
+ */
+function _normalizeAnthropicQuota(raw) {
+  if (!raw || typeof raw !== 'object') return null;
+  const f = raw.fields ?? {};
+  return {
+    schema_version: raw.schemaVersion ?? null,
+    last_fresh_at: raw.stale ? (raw.last_fresh_at ?? null) : (raw.probedAt ?? null),
+    utilization: {
+      '5h': f.utilization_5h ?? null,
+      '7d': f.utilization_7d ?? null,
+    },
+    reset: {
+      '5h': f.reset_5h ?? null,
+      '7d': f.reset_7d ?? null,
+      overall: f.reset ?? null,
+      overage: f.overage_reset ?? null,
+    },
+    representative_claim: f.representative_claim ?? null,
+    fallback_percentage: f.fallback_percentage ?? null,
+    overage: {
+      status: f.overage_status ?? null,
+      disabled_reason: f.overage_disabled_reason ?? null,
+    },
+    raw_available: (typeof raw.raw === 'object' && raw.raw !== null),
+  };
+}
+
+/**
+ * Aggregate per-provider quota status into a normalized dashboard-friendly
+ * shape. This is the D81 Phase 5 extension of lib/audit-query.mjs per
+ * ADR 0008 Amendment (D81).
+ *
+ * For each loaded provider, calls quotaStatus() (already cached at the plugin
+ * layer per ADR 0013 Rule 3) and normalizes to a consistent shape. Providers
+ * returning null (codex, mistral) produce a { status: 'unavailable' } row.
+ *
+ * Audit-query stays in-memory scan per ADR 0008 Lane 2 = A. This function
+ * does NOT scan the ndjson files; it calls the live provider plugins.
+ *
+ * Authority: ADR 0008 Amendment (D81) + ADR 0012 D81 + ADR 0013 Rule 5.
+ *
+ * @param {object} args
+ * @param {Map<string, object>} args.providers - Map of provider name → plugin object
+ * @param {(name: string) => Promise<object|null>} [args.getQuotaStatus] - injectable for tests;
+ *   defaults to calling providers.get(name).quotaStatus?.()
+ * @returns {Promise<Array<{
+ *   provider: string,
+ *   status: 'live' | 'stale' | 'unavailable' | 'disabled',
+ *   reason?: string,
+ *   schema_version: string | null,
+ *   last_fresh_at: number | null,
+ *   utilization: { '5h': number|null, '7d': number|null } | null,
+ *   reset: { '5h': number|null, '7d': number|null, overall: number|null, overage: number|null } | null,
+ *   representative_claim: string | null,
+ *   fallback_percentage: number | null,
+ *   overage: { status: string|null, disabled_reason: string|null } | null,
+ *   raw_available: boolean,
+ * }>>}
+ */
+export async function aggregateProviderQuota({
+  providers,
+  getQuotaStatus,
+} = {}) {
+  if (!providers) {
+    throw new Error('aggregateProviderQuota: providers (Map) is required');
+  }
+
+  // Normalize the providers argument — accept both Map and plain object.
+  const providerEntries = (providers instanceof Map)
+    ? [...providers.entries()]
+    : Object.entries(providers);
+
+  const results = [];
+  for (const [name, plugin] of providerEntries) {
+    // Default getter: call the plugin's quotaStatus() if present.
+    const fetchQuota = getQuotaStatus
+      ? () => getQuotaStatus(name)
+      : () => (typeof plugin?.quotaStatus === 'function' ? plugin.quotaStatus(null) : Promise.resolve(null));
+
+    let rawResult = null;
+    let callError = null;
+    try {
+      rawResult = await fetchQuota();
+    } catch (err) {
+      callError = err?.message ?? String(err);
+    }
+
+    if (callError !== null) {
+      // quotaStatus() threw — treat as error / unavailable.
+      results.push({
+        provider: name,
+        status: 'unavailable',
+        reason: callError,
+        schema_version: null,
+        last_fresh_at: null,
+        utilization: null,
+        reset: null,
+        representative_claim: null,
+        fallback_percentage: null,
+        overage: null,
+        raw_available: false,
+      });
+      continue;
+    }
+
+    if (rawResult === null || rawResult === undefined) {
+      // Plugin returned null: either disabled, no quota API, or no credentials.
+      results.push({
+        provider: name,
+        status: 'unavailable',
+        reason: 'no public quota api or probe disabled',
+        schema_version: null,
+        last_fresh_at: null,
+        utilization: null,
+        reset: null,
+        representative_claim: null,
+        fallback_percentage: null,
+        overage: null,
+        raw_available: false,
+      });
+      continue;
+    }
+
+    // quotaStatus() returned a non-null shape — normalize.
+    // Currently only 'anthropic' returns a structured shape; other providers
+    // returning structured data will work if their shape is compatible.
+    const isStale = rawResult.stale === true;
+    const normalized = _normalizeAnthropicQuota(rawResult);
+
+    if (normalized === null) {
+      // Shape was present but unrecognizable.
+      results.push({
+        provider: name,
+        status: 'unavailable',
+        reason: 'unrecognized quota shape',
+        schema_version: null,
+        last_fresh_at: null,
+        utilization: null,
+        reset: null,
+        representative_claim: null,
+        fallback_percentage: null,
+        overage: null,
+        raw_available: false,
+      });
+      continue;
+    }
+
+    results.push({
+      provider: name,
+      status: isStale ? 'stale' : 'live',
+      ...normalized,
+    });
+  }
+
+  return results;
+}
+
 /**
  * Audit-derived cache hit rate over the window. Differs from
  * `cacheStore.stats()` in server.mjs: that is the live in-process counter;