```

chore: enhance .gitignore and remove obsolete documentation files

- Reorganize .gitignore with categorized sections for better maintainability
- Add comprehensive ignore patterns for Python, Node.js, databases, logs, and build artifacts
- Add project-specific ignore rules for coordinator, explorer, and deployment files
- Remove outdated documentation: BITCOIN-WALLET-SETUP.md, LOCAL_ASSETS_SUMMARY.md, README-CONTAINER-DEPLOYMENT.md, README-DOMAIN-DEPLOYMENT.md
```

apps/coordinator-api/scripts/setup_postgresql.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+echo "=== PostgreSQL Setup for AITBC Coordinator API ==="
+echo ""
+
+# Create database and user
+echo "Creating coordinator database..."
+sudo -u postgres psql -c "CREATE DATABASE aitbc_coordinator;"
+sudo -u postgres psql -c "CREATE USER aitbc_user WITH PASSWORD 'aitbc_password';"
+sudo -u postgres psql -c "GRANT ALL PRIVILEGES ON DATABASE aitbc_coordinator TO aitbc_user;"
+
+# Grant schema permissions
+sudo -u postgres psql -d aitbc_coordinator -c 'ALTER SCHEMA public OWNER TO aitbc_user;'
+sudo -u postgres psql -d aitbc_coordinator -c 'GRANT CREATE ON SCHEMA public TO aitbc_user;'
+
+# Test connection
+echo "Testing connection..."
+sudo -u postgres psql -c "\l" | grep aitbc_coordinator
+
+echo ""
+echo "✅ PostgreSQL setup complete for Coordinator API!"
+echo ""
+echo "Connection details:"
+echo "  Database: aitbc_coordinator"
+echo "  User: aitbc_user"
+echo "  Host: localhost"
+echo "  Port: 5432"
+echo ""
+echo "You can now run the migration script."