Clearing thread local keys with clear_state=True

Author: SimonBFrank

Diff for: aws_lambda_powertools/logging/logger.py

@@ -648,6 +648,7 @@ def structure_logs(self, append: bool = False, formatter_options: Optional[Dict]
 
         # Mode 3
         self.registered_formatter.clear_state()
+        self.registered_formatter.clear_thread_local_keys()
         self.registered_formatter.append_keys(**log_keys)
 
     def set_correlation_id(self, value: Optional[str]) -> None:

Diff for: poetry.toml

@@ -0,0 +1,2 @@
+[virtualenvs]
+in-project = true