Server: update error handling

src/aare/daq/server.py

@@ -7,6 +7,7 @@ import cv2
 import urllib3
 import uvicorn
 from aare.common.coordinate import SmargonCoordinate, Coordinate
+from aare.common.error_codes import export_error_codes
 from aare.common.logger_config import setup_logger
 from aare.common.models import SampleShortInfo, DAQStatusModel, BeamlineStateEnum, BeamlineSettingsModel, \
     SampleShortInfoList, SessionStatus, SampleCameraSettings, AutofocusSettings, TokenData, \
@@ -29,12 +30,9 @@ from aare.daq.daq import AareDAQ
 from aare.daq.server_exception_handler import register_exception_handlers
 
 from aare.common.exception_handler import (
-    LoopCenteringFailed,
-    TransformationInvalidException,
-    MountingFailed,
-    WarningTellException,
-    CriticalTellException, SampleException, AuthenticationException,
-)
+    SampleException,
+    UserRightsException,
+    )
 
 app = FastAPI()
 register_exception_handlers(app)
@@ -56,6 +54,13 @@ async def login(form_data: OAuth2PasswordRequestForm = Depends()):
     data = auth.authenticate_user(cfg, form_data)
     return {"access_token": data, "token_type": "bearer"}
 
+@app.get("/meta/error-codes")
+async def meta_error_codes() -> dict[str, str]:
+    """
+    Public, stable registry of machine-readable error codes.
+    Useful for GUIs, tests, and diagnostics.
+    """
+    return export_error_codes()
 
 @app.get("/status")
 async def status(token: str = Depends(oauth2_scheme)) -> DAQStatusModel:
@@ -266,7 +271,7 @@ async def mount(dbid: int, token: str = Depends(oauth2_scheme), reference: bool
         raise SampleException(message="Sample not found")
 
     if not (token_data.staff or st.s[index].user in token_data.pgroups):
-        raise AuthenticationException(message="Sample belongs to a different user.")
+        raise UserRightsException(message="Sample belongs to a different user.")
 
     daq.sample = st.s[index]