Refactor message handling to use StatusMessage in queue operations

Author: AsafMah

azure-kusto-ingest/azure/kusto/ingest/_status_q.py

@@ -37,15 +37,15 @@ def is_empty(self) -> bool:
         """Checks if Status queue has any messages"""
         return len(self.peek(1, raw=True)) == 0
 
-    def _deserialize_message(self, m: QueueMessage) -> StatusMessage:
+    def _deserialize_message(self, m: QueueMessage) -> "StatusMessage":
         """Deserialize a message and return at as `message_cls`
         :param m: original message m.
         """
         return self.message_cls(m.content)
 
     # TODO: current implementation takes a union top n /  len(queues), which is not ideal,
     #  because the user is not supposed to know that there can be multiple underlying queues
-    def peek(self, n=1, raw=False) -> List[StatusMessage]:
+    def peek(self, n=1, raw=False) -> List["StatusMessage"]:
         """Peek status queue
         :param int n: number of messages to return as part of peek.
         :param bool raw: should message content be returned as is (no parsing).
@@ -90,7 +90,7 @@ def _peek_specific_q(_q: QueueClient, _n: int) -> bool:
 
     # TODO: current implementation takes a union top n /  len(queues), which is not ideal,
     #  because the user is not supposed to know that there can be multiple underlying queues
-    def pop(self, n: int = 1, raw: bool = False, delete: bool = True) -> List[StatusMessage]:
+    def pop(self, n: int = 1, raw: bool = False, delete: bool = True) -> List["StatusMessage"]:
         """Pop status queue
         :param int n: number of messages to return as part of peek.
         :param bool raw: should message content be returned as is (no parsing).