release(v0.3.2): patch release — post-Phase-3 cleanup batch #2 (streaming-path singleflight + TOCTOU close, D57+D58+D59) (#39)

Patch release closing v1.x roadmap #1 end-to-end. ADR 0005 Amendment 8
§§1-14 implemented across 3 D-days (PR #36, #37, #38, all merged):

- D57 (PR #36): cache layer — cacheStore.getOrComputeStreaming(...) +
  tee fan-out + late-joiner replay + per-client backpressure +
  AbortController propagation. New STREAM_BACKPRESSURE error code (not
  a hard trigger). Suite 27 = 12 unit tests.
- D58 (PR #37): server wiring — streaming branch swap; tryAcquireSpawn
  moved into sourceFactory; X-OLP-Streaming-Inflight: source|attached
  header; cache_status: 'streaming_attached' audit value;
  audit-query gauge reconciliation. Suite 28 = 8 HTTP integration tests.
- D59 (PR #38): docs polish — README § Known limitations inverted;
  v1.x roadmap #1 closed; issue #16 closed.

Test count: 603 (v0.3.1) → 623 (v0.3.2). +20 tests across the SF arc.

Patch-release classification per release_kit.phase_rolling_mode +
maintainer release-cut decision (this session, 2026-05-25): the new
wire surface (X-OLP-Streaming-Inflight header + streaming_attached
cache_status) is semver-wise a minor bump, but this is roadmap-cleanup
work — NOT Phase 4 product scope. The reserved 0.4.0 identifier stays
for the formal Phase 4 close. v0.3.2 ships as a patch under the Phase 4
pre-release banner.

Authority: ADR 0005 Amendment 8 (design ratified at D42 2026-05-25;
implementation gated on maintainer "go" — fired 2026-05-25 post-v0.3.1).
docs/v1x-roadmap.md #1 (closed). GitHub issue #16 (closed). ADR 0002
Amendment 6 (D38 tryAcquireSpawn/releaseSpawn semantics, now invoked
from sourceFactory closure).

Co-authored-by: dtzp555 <dtzp555@gmail.com>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "olp",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "description": "Personal multi-provider LLM proxy. Successor to OCP. One HTTP endpoint, multiple subscriptions behind it, automatic routing + fallback + caching.",
   "type": "module",
   "main": "server.mjs",