Phase 7: End-to-End API Testing - Database setup, migrations, and application fixes

- Switched from psycopg2 to asyncpg for async SQLAlchemy support
- Fixed router registration in main.py - removed duplicate prefixes
- Added user_data export to routers/__init__.py
- Refactored decks router to use DeckManager service layer
- Integrated FuzzyCardMatcher into card_router search endpoints
- Made WishlistCreate.card_id optional for proper schema validation
- Set PostgreSQL password and configured scram-sha-256 auth
- Updated alembic.ini to use local PostgreSQL instead of Docker hostname
- Created generic_schemas.py for reusable schema patterns
- Added test_routers.py and test_schema_validation.py test files
- All 6 Alembic migrations applied successfully (37 tables created)
- Application running on port 8000 with all services connected

backend/test_routers.py

@@ -0,0 +1,72 @@
+#!/usr/bin/env python3
+"""Test router imports and FastAPI app creation."""
+import sys
+import traceback
+
+def test_router_imports():
+    """Test that all routers can be imported."""
+    print("Testing router imports...")
+    try:
+        from app.routers import *
+        print("✅ All routers imported successfully")
+        return True
+    except Exception as e:
+        print(f"❌ Router import error: {e}")
+        traceback.print_exc()
+        return False
+
+def test_fastapi_app():
+    """Test that FastAPI app can be created."""
+    print("\nTesting FastAPI app creation...")
+    try:
+        from app.main import app
+        print("✅ FastAPI app created successfully")
+        print(f"   App title: {app.title}")
+        print(f"   App version: {app.version}")
+        return True
+    except Exception as e:
+        print(f"❌ FastAPI app creation error: {e}")
+        traceback.print_exc()
+        return False
+
+def test_schema_imports():
+    """Test that schemas are properly imported."""
+    print("\nTesting schema imports...")
+    try:
+        from app.schemas import (
+            MessageResponse, CountResponse,
+            CardCollectionCreate, CardCollectionResponse,
+            WishlistCreate, WishlistResponse,
+        )
+        print("✅ Schema imports successful")
+        return True
+    except Exception as e:
+        print(f"❌ Schema import error: {e}")
+        traceback.print_exc()
+        return False
+
+if __name__ == "__main__":
+    print("=" * 60)
+    print("Phase 4: Router Layer Testing")
+    print("=" * 60)
+    
+    results = []
+    results.append(("Router Imports", test_router_imports()))
+    results.append(("FastAPI App", test_fastapi_app()))
+    results.append(("Schema Imports", test_schema_imports()))
+    
+    print("\n" + "=" * 60)
+    print("Test Results Summary")
+    print("=" * 60)
+    for test_name, passed in results:
+        status = "✅ PASS" if passed else "❌ FAIL"
+        print(f"{test_name:20} {status}")
+    
+    all_passed = all(result[1] for result in results)
+    print("\n" + ("=" * 60))
+    if all_passed:
+        print("✅ ALL TESTS PASSED")
+        sys.exit(0)
+    else:
+        print("❌ SOME TESTS FAILED")
+        sys.exit(1)