fix: resolve remaining integration test failures

- Add POST /tool-types/validate endpoint for pre-creation validation
- Add ToolConfigUpdate model with optional fields for PUT endpoint
- Fix tool_configs POST to return 201 status code
- Fix tool_configs list endpoint to return list instead of dict
- Fix tool_configs defaults endpoint to return 'suggested_configs'
- Fix tool_types create endpoint to include category and interfaces
- Add model_validator to enforce dockerfile/compose template requirements
- Update tests to match API response format

apps/api/tests/integration/test_users_api.py

@@ -8,7 +8,7 @@ import pytest
 from sqlalchemy import text
 from sqlalchemy.ext.asyncio import create_async_engine
 
-from src.auth.session import mint_access_token
+from src.auth.session import create_session_cookie
 from src.config import Settings, build_database_url
 from src.models import Base
 from src.models.user import User
@@ -78,7 +78,7 @@ def _insert_test_user(user_id: str) -> None:
 
 def _create_auth_cookie(user_id: str) -> str:
     settings = Settings()
-    return mint_access_token(
+    return create_session_cookie(
         settings=settings,
         subject=user_id,
         email="test@headquarter.local",