feat: Add notifyerrors configuration to rotations.json

- Add 'notifyerrors' field to rotation configuration (default: false)
- When enabled, return errors as normal messages instead of HTTP 503
- Allows clients to consume error messages normally without HTTP errors
- Update handlers.py to check notifyerrors setting and return appropriate response

aisbf/handlers.py

@@ -817,6 +817,9 @@ class RotationHandler:
             logger.error(f"Rotation {rotation_id} not found")
             raise HTTPException(status_code=400, detail=f"Rotation {rotation_id} not found")
         
+        # Check if notifyerrors is enabled for this rotation
+        notify_errors = rotation_config.get('notifyerrors', False)
+
         logger.info(f"Rotation config loaded successfully")
         providers = rotation_config.providers
         logger.info(f"Number of providers in rotation: {len(providers)}")
@@ -916,6 +919,34 @@ class RotationHandler:
                     else:
                         error_details.append(f"  - {provider_id}: Not configured")
             
+            # Check if notifyerrors is enabled - if so, return error as normal message instead of HTTP 503
+            if notify_errors:
+                logger.info(f"notifyerrors is enabled for rotation '{rotation_id}', returning error as normal message")
+                # Return a normal response with error message instead of HTTP 503
+                error_message = f"All providers in rotation '{rotation_id}' failed. Details: {'; '.join(error_details)}"
+                return {
+                    "id": f"error-{rotation_id}-{int(time.time())}",
+                    "object": "chat.completion",
+                    "created": int(time.time()),
+                    "model": rotation_id,
+                    "choices": [{
+                        "index": 0,
+                        "message": {
+                            "role": "assistant",
+                            "content": error_message
+                        },
+                        "finish_reason": "stop"
+                    }],
+                    "usage": {
+                        "prompt_tokens": 0,
+                        "completion_tokens": len(error_message),
+                        "total_tokens": len(error_message)
+                    },
+                    "aisbf_error": True,
+                    "rotation_id": rotation_id,
+                    "error_details": error_details
+                }
+            else:
                 raise HTTPException(
                     status_code=503,
                     detail={
@@ -1234,6 +1265,38 @@ class RotationHandler:
             else:
                 error_details.append(f"  - {provider_id}: Not configured")
         
+        # Check if notifyerrors is enabled - if so, return error as normal message instead of HTTP 503
+        if notify_errors:
+            logger.info(f"notifyerrors is enabled for rotation '{rotation_id}', returning error as normal message")
+            # Return a normal response with error message instead of HTTP 503
+            error_message = f"All providers in rotation '{rotation_id}' failed after {max_retries} attempts. Details: {'; '.join(error_details)}"
+            return {
+                "id": f"error-{rotation_id}-{int(time.time())}",
+                "object": "chat.completion",
+                "created": int(time.time()),
+                "model": rotation_id,
+                "choices": [{
+                    "index": 0,
+                    "message": {
+                        "role": "assistant",
+                        "content": error_message
+                    },
+                    "finish_reason": "stop"
+                }],
+                "usage": {
+                    "prompt_tokens": 0,
+                    "completion_tokens": len(error_message),
+                    "total_tokens": len(error_message)
+                },
+                "aisbf_error": True,
+                "rotation_id": rotation_id,
+                "attempted_models": [m['name'] for m in tried_models],
+                "attempted_count": len(tried_models),
+                "max_retries": max_retries,
+                "last_error": last_error,
+                "error_details": error_details
+            }
+        else:
             raise HTTPException(
                 status_code=503,
                 detail={

config/rotations.json

 {
+  "notifyerrors": false,
   "rotations": {
     "coding": {
       "model_name": "coding",
+      "notifyerrors": false,
       "providers": [
         {
           "provider_id": "gemini",
@@ -85,6 +87,7 @@
     },
     "general": {
       "model_name": "general",
+      "notifyerrors": false,
       "providers": [
         {
           "provider_id": "gemini",
@@ -122,6 +125,7 @@
     },
     "googletest": {
       "model_name": "googletest",
+      "notifyerrors": false,
       "providers": [
         {
           "provider_id": "gemini",