Implement real, working microservices architecture

backend/services/migration_runner/Dockerfile

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+# Migration Runner Dockerfile
+FROM backend/base:latest
+
+# Copy migration files
+COPY backend/alembic /app/backend/alembic/
+COPY backend/migration.py /app/backend/migration.py
+
+# Copy migration runner
+COPY backend/services/migration_runner/main.py /app/backend/services/migration_runner/main.py
+
+# Set service name for entrypoint
+ENV SERVICE_NAME=migration_runner
+
+# Override entrypoint to run migrations
+ENTRYPOINT ["python", "-m", "backend.services.migration_runner.main"]

backend/services/migration_runner/main.py

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+#!/usr/bin/env python3
+"""
+Migration runner service - executes database migrations and exits.
+This service runs Alembic migrations against PostgreSQL and terminates.
+"""
+
+import os
+import sys
+from pathlib import Path
+from alembic import command
+from alembic.config import Config
+
+def run_migrations():
+    """Run Alembic migrations."""
+    print("Starting database migrations...")
+
+    # Change to backend directory to run migrations
+    backend_dir = Path(__file__).parent.parent.parent
+    os.chdir(backend_dir)
+
+    # Ensure shared models are imported for alembic
+    import backend.shared.models
+
+    # Set DATABASE_URL from environment if not set
+    db_url = os.getenv("DATABASE_URL")
+    if not db_url:
+        print("ERROR: DATABASE_URL environment variable not set")
+        sys.exit(1)
+
+    # Export DATABASE_URL for alembic
+    os.environ["DATABASE_URL"] = db_url
+
+    try:
+        # Use the robust migration system from migration.py
+        # This handles all edge cases and recovery scenarios automatically
+        print("Starting database migrations...")
+
+        # Import and run the migration function
+        from backend.migration import run_migrations
+        run_migrations()
+
+        print("Database migrations completed successfully!")
+
+    except Exception as e:
+        print(f"ERROR: Failed to run migrations: {e}")
+        import traceback
+        traceback.print_exc()
+        sys.exit(1)
+
+if __name__ == "__main__":
+    run_migrations()