Add deployment helpers and environment config

- Add manual deployment instructions for self-hosted Supabase
- Add schema refresh SQL scripts
- Add deployment helper scripts
- Add Supabase environment configuration

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

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

force-schema-refresh.sql

@@ -0,0 +1,11 @@
+-- Force schema cache refresh by selecting from the table
+SELECT * FROM platform_settings LIMIT 1;
+
+-- Verify the column exists
+SELECT column_name, data_type, is_nullable
+FROM information_schema.columns 
+WHERE table_name = 'platform_settings' 
+AND column_name = 'google_service_account_json';
+
+-- Update the table to trigger cache refresh (safe operation, just sets same value)
+UPDATE platform_settings SET id = id WHERE 1=1 LIMIT 1;