fix(sdk/mcp): correct aggregator API path and response model attributes

- SDK: Change chat endpoint paths from /chat to /api/v1/chat to match
  aggregator router configuration
- MCP: Remove non-existent attributes from SourceInfo (retrieval_time_ms)
  and ChatMetadata (model_used, tokens_used) response formatting

Fixes 404 errors when calling aggregator and attribute errors in response parsing.

Author: IonesioJunior

mcp/server.py

@@ -1737,12 +1737,14 @@ def chat_with_syfthub(
         sources_info = []
         if response.sources:
             for source in response.sources:
-                sources_info.append({
+                source_entry = {
                     "path": source.path,
                     "status": source.status.value if hasattr(source.status, 'value') else str(source.status),
                     "documents_retrieved": source.documents_retrieved,
-                    "retrieval_time_ms": source.retrieval_time_ms
-                })
+                }
+                if source.error_message:
+                    source_entry["error_message"] = source.error_message
+                sources_info.append(source_entry)
 
         # Format metadata
         metadata_info = {}
@@ -1751,8 +1753,6 @@ def chat_with_syfthub(
                 "retrieval_time_ms": response.metadata.retrieval_time_ms,
                 "generation_time_ms": response.metadata.generation_time_ms,
                 "total_time_ms": response.metadata.total_time_ms,
-                "model_used": response.metadata.model_used,
-                "tokens_used": response.metadata.tokens_used
             }
 
         logger.info(f"Chat query successful. Response length: {len(response.response)}")

sdk/python/src/syfthub_sdk/chat.py

@@ -501,7 +501,7 @@ def complete(
 
         try:
             response = self._agg_client.post(
-                f"{self._aggregator_url}/chat",
+                f"{self._aggregator_url}/api/v1/chat",
                 json=request_body,
                 headers={"Content-Type": "application/json"},
             )
@@ -627,7 +627,7 @@ def stream(
         try:
             with self._agg_client.stream(
                 "POST",
-                f"{self._aggregator_url}/chat/stream",
+                f"{self._aggregator_url}/api/v1/chat/stream",
                 json=request_body,
                 headers={
                     "Content-Type": "application/json",