fix!: Remove unused "stats" field from RequestQueueMetadata

docs/upgrading/upgrading_to_v1.md

@@ -174,6 +174,7 @@ destination you choose.
 - The `set_metadata` method has been removed.
 - `resource_directory` from `RequestQueueMetadata` removed – use `path_to_...` property.
 - `RequestQueueHead` model replaced with `RequestQueueHeadWithLocks`.
+- The `stats` field was removed from `RequestQueueMetadata` as it wasn't used for anything.
 
 ## New default HTTP client
 

src/crawlee/storage_clients/_file_system/_request_queue_client.py

@@ -246,7 +246,6 @@ async def open(
                     had_multiple_clients=False,
                     handled_request_count=0,
                     pending_request_count=0,
-                    stats={},
                     total_request_count=0,
                 )
                 client = cls(

src/crawlee/storage_clients/_memory/_request_queue_client.py

@@ -93,7 +93,6 @@ async def open(
             had_multiple_clients=False,
             handled_request_count=0,
             pending_request_count=0,
-            stats={},
             total_request_count=0,
         )
 

src/crawlee/storage_clients/models.py

@@ -70,9 +70,6 @@ class RequestQueueMetadata(StorageMetadata):
     pending_request_count: Annotated[int, Field(alias='pendingRequestCount')]
     """The number of requests that are still pending in the queue."""
 
-    stats: Annotated[dict, Field(alias='stats')]
-    """Statistics about the request queue, TODO?"""
-
     total_request_count: Annotated[int, Field(alias='totalRequestCount')]
     """The total number of requests that have been added to the queue."""