- Added comprehensive integration tests for CSRF protection middleware:
* GET/HEAD/OPTIONS pass without token (safe methods)
* POST/PUT/DELETE require valid CSRF token
* Requests without token are rejected (403)
* Requests with invalid token are rejected (403)
* Requests with valid token pass
* CSRF token generation endpoint
* Unauthenticated users are not blocked by CSRF
* Public endpoints are not blocked
* Each user has their own token
* Same token can be used multiple times
- Tests use Redis for token storage and validation
- All tests tagged with integration build tag
