docs(phase-2): complete context and implementation planning

- Documented comprehensive plan for Phase 2: Rooms and Tasks
- Includes feature scope, requirements, implementation decisions, UI/UX specifics, and scheduling logic
- Updated schema: added Room and Task tables with CRUD and recurrence support
- Added implementation details for room/task templates, cleanliness indicators, and overdue task handling
- Generated Drift schemas for database versioning (v1 → v2) with test coverage

.planning/config.json

@@ -3,11 +3,16 @@
   "granularity": "coarse",
   "parallelization": true,
   "commit_docs": true,
-  "model_profile": "quality",
+  "model_profile": "balanced",
   "workflow": {
     "research": true,
     "plan_check": true,
     "verifier": true,
-    "nyquist_validation": true
+    "nyquist_validation": true,
+    "auto_advance": true,
+    "_auto_chain_active": true
+  },
+  "git": {
+    "branching_strategy": "none"
   }
-}
+}