feat(advisor): add Advisor plugin (Grok 4.6 consults at key checkpoints) - #314

Bugbot Analysis Progress (5m 37s elapsed)

✅ Gathered PR context (2s)
✅ Completed bug detection (5m 26s)
✅ Posted analysis results (8s)

Final Result: Bugbot completed review - no new issues found! ✅

Request ID: serverGenReqId_b2a4b89b-bfe8-4a7b-82a8-57a2dd7c2a7e