Add Supabase schema migration for design thinking

- Add projects table with current_phase and health_score
- Add project_phases for tracking phase status per iteration
- Add backlog_items with WSJF prioritization (computed priority_score)
- Add ai_recommendations for AI-powered insights
- Add project_health_snapshots for historical tracking
- Add project_activities for activity feed
- Include RLS policies and helper functions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

supabase/apply-migration.md

@@ -0,0 +1,45 @@
+# Applying the Design Thinking Schema Migration
+
+## Option 1: Supabase Studio (Recommended)
+1. Go to https://supabase.mylder.io
+2. Login with dashboard credentials:
+   - User: `5f7DODtzYzoXKusR`
+   - Password: `VHmrbh9a6QVcXE2b2hMblhPoRsqsd2Gj`
+3. Navigate to SQL Editor
+4. Copy contents of `migrations/20251214_design_thinking_schema.sql`
+5. Execute
+
+## Option 2: Via psql on VPS
+```bash
+# SSH to VPS
+ssh root@149.102.155.84
+
+# Find the PostgreSQL container
+docker ps | grep postgres
+
+# Execute migration
+docker exec -i <postgres_container> psql -U supabase -d postgres < /path/to/migration.sql
+```
+
+## Option 3: Via docker exec with heredoc
+```bash
+docker exec -i supabase-db psql -U supabase postgres <<'SQL'
+-- Paste contents of 20251214_design_thinking_schema.sql here
+SQL
+```
+
+## Verification
+After applying, verify tables exist:
+```sql
+SELECT table_name FROM information_schema.tables
+WHERE table_schema = 'public'
+ORDER BY table_name;
+```
+
+Expected tables:
+- projects
+- project_phases
+- backlog_items
+- ai_recommendations
+- project_health_snapshots
+- project_activities