Refactor async methods to adjust return types.

Changed `send_json` to return `None` instead of yielding and updated log retrieval to use `yield` in place of `return`. These modifications align function behavior with intended asynchronous use cases and improve consistency.

src/phoenix_technologies/gptresearch/deepresearch.py

@@ -9,11 +9,10 @@ class CustomLogsHandler:
             logs = []
         self.logs = logs  # Initialize logs to store data
 
-    async def send_json(self, data: Dict[str, Any]) -> AsyncGenerator[str, Any]:
+    async def send_json(self, data: Dict[str, Any]) -> None:
         """Send JSON data and log it."""
         self.logs.append(data)  # Append data to logs
         print(f"My custom Log: {data}")
-        yield f"My custom Log: {data}"
 
 class ReportGenerator:
     def __init__(self, query: str, report_type: str):
@@ -64,6 +63,6 @@ class ReportGenerator:
         if self._log_index < len(self.logs):
             log = self.logs[self._log_index]
             self._log_index += 1
-            return log  # Return the next log
+            yield log  # Return the next log
         else:
             raise StopAsyncIteration  # Stop when logs are exhausted