Remove support for integration testing mode

- Remove app-integration-test service from Docker Compose
- Remove references to integration testing mode from documentation
- Clean up CLAUDE.md to reflect current Docker services

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

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

CLAUDE.md

@@ -12,8 +12,6 @@ docker compose run dev
 # Run comprehensive test suite
 docker compose run test
 
-# Run integration tests with test data
-docker compose run app-integration-tests
 
 # Generate GraphQL TypeScript types
 npm run generate
@@ -81,7 +79,6 @@ Currently supports Chapman University (Passio System ID: "263"). Each university
 ### Docker Services
 - `dev` - Development with hot reload
 - `test` - Unit/integration testing
-- `app-integration-test` - Integration with test data
 - `redis` - Persistent Redis
 - `redis-no-persistence` - Ephemeral Redis for tests