- Add POST/GET /skill-registry/skills/:sourceId/:slug/ratings routes
- Import skillRatingService in skill-registry routes
- Add upsertCommunityRatingsStub() in fetcher, called after each skill upsert
- Import communityRatings from schema in fetcher
- Update list() and getById() in skill-registry.ts to LEFT JOIN communityRatings
- Include averageRating, ratingCount, taskCount, avgCostUsd, lastUsedAt in SkillListItem
- Add agentSkills usage aggregation via LEFT JOIN + SUM/AVG/MAX
- Add fire-and-forget recordUsageForAgent call in heartbeat after finalizeAgentStatus
- Dynamic import keeps skill-registry-ratings off critical startup path
- All 44 skill-registry tests pass, full server suite (536) green