release: v3.3.0 — smart recall layer

Phase 3 features:
- Relevance injection: auto-inject related history at session start
- Memory decay: old archives move to cold/ storage after 30 days
- Enhanced export: --from/--to/--tag filters, includes sessions+summaries
- /mc recall command: keyword-scored history search

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "memory-continuity",
-  "version": "3.2.0",
+  "version": "3.3.0",
   "description": "Zero-dependency memory continuity for OpenClaw — plain markdown, lifecycle hooks, no vector DB.",
   "main": "index.js",
   "type": "module",