fix: Add notifyerrors field to RotationConfig model

- Add notifyerrors field with default value False
- Fixes issue where notifyerrors was always detected as False
- Allows rotation to return error as normal message instead of HTTP 503

aisbf/config.py

@@ -55,6 +55,7 @@ class ProviderConfig(BaseModel):
 
 class RotationConfig(BaseModel):
     providers: List[Dict]
+    notifyerrors: bool = False
 
 class AutoselectModelInfo(BaseModel):
     model_id: str