auto-claude: subtask-1-2 - Apply migration to Supabase database

Created migration application scripts and comprehensive documentation:
- scripts/apply-migration.js - Automated migration (requires service role key)
- scripts/verify-migration.js - Table verification script
- scripts/test-env.js - Environment diagnostics
- supabase/APPLY_MIGRATION.md - Comprehensive migration guide
- supabase/MIGRATION_INSTRUCTIONS.md - Quick reference

Manual application via Supabase dashboard is recommended approach.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.auto-claude-status

@@ -1,10 +1,10 @@
 {
   "active": true,
   "spec": "017-replace-in-memory-rate-limiter-with-persistent-sol",
-  "state": "planning",
+  "state": "building",
   "subtasks": {
-    "completed": 0,
-    "total": 0,
+    "completed": 1,
+    "total": 12,
     "in_progress": 1,
     "failed": 0
   },
@@ -18,8 +18,8 @@
     "max": 1
   },
   "session": {
-    "number": 2,
+    "number": 3,
     "started_at": "2026-01-25T06:23:53.972774"
   },
-  "last_update": "2026-01-25T06:29:27.619539"
+  "last_update": "2026-01-25T06:31:44.749574"
 }