bug: `/api/v1` returns 404 on feast UI

jacob-bush-shopify

Expected Behavior

Running feast ui and navigating to http://0.0.0.0:8888 should load data from the feature store successfully.

In particular, this works on 0.63.0

❯ uvx 'feast[mysql,gcp]==0.63' ui
Installed 96 packages in 266ms
/Users/jacobbush/.cache/uv/archive-v0/H_s47SDJvNttrTnFOEpMY/lib/python3.13/site-packages/feast/ui_server.py:45: DeprecationWarning: 
        on_event is deprecated, use lifespan event handlers instead.

        Read more about it in the
        [FastAPI docs for Lifespan Events](https://fastapi.tiangolo.com/advanced/events/).
        
  @app.on_event("shutdown")
/Users/jacobbush/.cache/uv/archive-v0/H_s47SDJvNttrTnFOEpMY/lib/python3.13/site-packages/fastapi/applications.py:4598: DeprecationWarning: 
        on_event is deprecated, use lifespan event handlers instead.

        Read more about it in the
        [FastAPI docs for Lifespan Events](https://fastapi.tiangolo.com/advanced/events/).
        
  return self.router.on_event(event_type)  # ty: ignore[deprecated]
/Users/jacobbush/.cache/uv/archive-v0/H_s47SDJvNttrTnFOEpMY/lib/python3.13/site-packages/websockets/legacy/__init__.py:6: DeprecationWarning: websockets.legacy is deprecated; see https://websockets.readthedocs.io/en/stable/howto/upgrade.html for upgrade instructions
  warnings.warn(  # deprecated in 14.0 - 2024-11-09
/Users/jacobbush/.cache/uv/archive-v0/H_s47SDJvNttrTnFOEpMY/lib/python3.13/site-packages/uvicorn/protocols/websockets/websockets_impl.py:17: DeprecationWarning: websockets.server.WebSocketServerProtocol is deprecated
  from websockets.server import WebSocketServerProtocol
INFO:     Started server process [53505]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
INFO:     Uvicorn running on http://0.0.0.0:8888 (Press CTRL+C to quit)
INFO:     127.0.0.1:57256 - "GET /projects-list.json HTTP/1.1" 200 OK
INFO:     127.0.0.1:57256 - "GET /registry HTTP/1.1" 200 OK
INFO:     127.0.0.1:57257 - "GET /registry HTTP/1.1" 200 OK
^CINFO:     Shutting down
INFO:     Waiting for application shutdown.
INFO:     Application shutdown complete.
INFO:     Finished server process [53505]

Current Behavior

We get "GET /api/v1 HTTP/1.1" 404 Not Found and no features are loaded.

❯ uvx 'feast[mysql,gcp,grpcio]==0.64' ui
Installed 98 packages in 213ms
/Users/jacobbush/.cache/uv/archive-v0/fq4ZGscWWKwrMSlB-5Oxk/lib/python3.13/site-packages/websockets/legacy/__init__.py:6: DeprecationWarning: websockets.legacy is deprecated; see https://websockets.readthedocs.io/en/stable/howto/upgrade.html for upgrade instructions
  warnings.warn(  # deprecated in 14.0 - 2024-11-09
/Users/jacobbush/.cache/uv/archive-v0/fq4ZGscWWKwrMSlB-5Oxk/lib/python3.13/site-packages/uvicorn/protocols/websockets/websockets_impl.py:17: DeprecationWarning: websockets.server.WebSocketServerProtocol is deprecated
  from websockets.server import WebSocketServerProtocol
INFO:     Started server process [55591]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
INFO:     Uvicorn running on http://0.0.0.0:8888 (Press CTRL+C to quit)
INFO:     127.0.0.1:57343 - "GET /projects-list.json HTTP/1.1" 200 OK
INFO:     127.0.0.1:57343 - "GET /api/v1 HTTP/1.1" 404 Not Found
INFO:     127.0.0.1:57343 - "GET /api/v1 HTTP/1.1" 404 Not Found
^CINFO:     Shutting down
INFO:     Waiting for application shutdown.
INFO:     Application shutdown complete.
INFO:     Finished server process [55591]

Steps to reproduce

uvx 'feast[grpcio]==0.64' init feast_0_64_ui_404_bug
cd feast_0_64_ui_404_bug/feature_repo
uvx 'feast[grpcio]==0.64' apply
uvx 'feast[grpcio]==0.64' ui
Navigate to http://0.0.0.0:8888

Specifications

Version: 0.64.0
Platform: MacOS
Subsystem: Tahoe 26.3.1 (a)

Possible Solution

Feast UI was refactored in this PR which is where I assume this was introduced.