- Updated all API paths (except internal routes) to include /api/ prefix
- Changed server URL from "/api" back to "/" and added prefix to individual paths
- Updated test fixtures to not add /api prefix since paths already include it
- Fixed all test assertions to use the new paths with /api/ prefix
This addresses the review comment about endpoints needing the /api/ prefix
and implements it correctly by hardcoding the prefix in each path definition.
Fixes#8219
- Simplified api_client fixture to hardcode /api prefix
- Updated websocket endpoint test to use /api/ws
- Fixed internal endpoint tests to not use /api prefix
- Enhanced validation.py to handle OpenAPI nullable syntax
