[milestone Milestone 7 ] Implement `HealthMonitor` service that continuously polls EvidenceStore for chai...

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🤖 Auto-filed from milestone doc bullet.

Repo: WasmAgent/wasmagent-js
Milestone: Milestone 7 — Realtime Monitoring & Anomaly Detection
Bullet:

Implement HealthMonitor service that continuously polls EvidenceStore for chain gaps, signature failures, and timestamp anomalies

Relevant code context (from worktree)

contains 'service': packages/aisdk/src/index.ts
contains 'service': packages/cloudflare-worker/src/auth.test.ts
contains 'service': packages/core/src/memory/MemoryBlocks.ts
contains 'continuously': node_modules/.bun/@types+node@18.19.130/node_modules/@types/node/v8.d.ts
contains 'continuously': node_modules/.bun/minisearch@7.2.0/node_modules/minisearch/src/SearchableMap/fuzzySearch.ts
contains 'continuously': node_modules/.bun/@types+node@22.19.19/node_modules/@types/node/v8.d.ts

Acceptance criteria

• Command bun install --frozen-lockfile && bun run build && bun run test passes
• The specific work described in the bullet above is implemented in the smallest number of files required.
• No unrelated files touched (git status --short output limited to the intended change).

Notes for the implementer

This issue was auto-created by SweepMilestoneBulletToIssue. The bullet text is verbatim
from the milestone doc. If ambiguous or too large for a single implement cycle,
verify-first should return NEEDS_SPLIT with sub-issue proposals or NEEDS_HUMAN with the blocker.

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