chore(release): v3.0.0-beta.4 — Phase 2 complete, halfvec HNSW fix (#95)

[salishforge]

Summary

• Ships Phase 2 of the ROADMAP to npm (namespaces, cold tier search/restore, memory budgeting, adaptive sleep advisory).
• Fixes schema: halfvec HNSW indexes silently fail to create (no dimension spec) #95: `schema.sql` no longer issues failing `CREATE INDEX` statements for HNSW on bare halfvec columns. The two indexes now live in a new `schema/hnsw-indexes.example.sql` that operators apply after pinning their embedding dimension.
• First release via npm Trusted Publishing (OIDC) — validates the infrastructure from Sprint A + PR ci(release): switch publish to npm Trusted Publishing (OIDC) #97 end-to-end.

Files

• `package.json` — `3.0.0-beta.3` → `3.0.0-beta.4`
• `CHANGELOG.md` — new beta.4 entry (Added / Changed / Known gaps)
• `ROADMAP.md` — `Where We Are Today` bumped; Phase 1 remaining items collapsed (all shipped); Phase 2 marked COMPLETE with per-item PR references; Multi-model revision strategy for sleep cycles #13 two-pass triage flagged as the remaining partial item
• `schema/schema.sql` — remove the two failing `CREATE INDEX ... USING hnsw` statements; comment with rationale and pointer to the example
• `schema/hnsw-indexes.example.sql` (new) — template for operators with embeddings (covers 384, 768, 1536, 3072 dimensions)

Phase 2 scorecard (closed on merge)

• ✅ Memory namespaces (Memory namespaces/tags for content organization #16) — PRs feat(namespaces): memory namespaces backend — schema + MemoryManager + tests (Sprint C.1, #16) #100, feat(namespaces): propagate namespace through public surfaces (Sprint C.2, #16) #101
• ✅ Cold tier search + restoration (Cold tier querying and restoration #14) — PR feat(cold-tier): search + restoration for audit/recovery (Sprint D, #14) #102
• ✅ Memory budgeting — PR feat(sleep-cycle): memory budgeting — per-agent warm_tier hard cap (Sprint E) #103
• ✅ Adaptive sleep scheduling — PR feat: adaptive sleep advisory — memory-health-driven scheduling hints (Sprint F) #104
• ✅ Per-agent scoring weights (Configurable importance scoring weights per agent #17) — shipped in v2.4
• ⚠️ Multi-model revision (Multi-model revision strategy for sleep cycles #13) — basic split plumbed; two-pass triage variant deferred

Issue cleanup (closed since beta.3)

#10, #14, #16, #17, #18, #35, #43, #46, #50 — all shipped but not previously closed on the tracker. Status comments added to #13 and #41 documenting current state without closing.

Test plan

• CI type-check / lint / build pass
• CI test-integration (Node 20, 22) — the namespace / cold / budgeting / advisory test suites all run
• CI test-rls passes — RLS still enforced under all new per-namespace paths
• On merge + tag `v3.0.0-beta.4`, release workflow publishes via OIDC (Trusted Publishing) — no `NPM_TOKEN` used. Validates ci(release): switch publish to npm Trusted Publishing (OIDC) #97 end-to-end.
• GitHub Release auto-created with the CHANGELOG excerpt for beta.4

Follow-up after merge

1. Tag `v3.0.0-beta.4` on `main` — triggers the release workflow.
2. If OIDC publish succeeds: delete the `NPM_TOKEN` repo secret. If it fails: diagnose, re-tag if needed.
3. Next sprint candidates: close remaining Phase 2 work (Multi-model revision strategy for sleep cycles #13 two-pass triage), start Phase 3 / security (security: Redis cache poisoning — no schema validation on deserialized data #41), or begin Phase 4 ROADMAP items.