feat(scope): Emit buffer_overflow discard reason when popping breadcrumbs

Author: AbhiPrasad

sentry_sdk/_types.py

@@ -159,6 +159,7 @@ class SDKInfo(TypedDict):
         "metric_bucket",
         "monitor",
         "span",
+        "log_item",
     ]
     SessionStatus = Literal["ok", "exited", "crashed", "abnormal"]
 

sentry_sdk/scope.py

@@ -972,6 +972,8 @@ def add_breadcrumb(self, crumb=None, hint=None, **kwargs):
             logger.info("before breadcrumb dropped breadcrumb (%s)", crumb)
 
         while len(self._breadcrumbs) > max_breadcrumbs:
+            if client.transport is not None:
+                client.transport.record_lost_event("buffer_overflow", "log_item")
             self._breadcrumbs.popleft()
 
     def start_transaction(