fix: only clean up channel types older than 2 minutes

Prevents parallel runners from deleting each other's freshly created
channel types while still freeing stale slots from previous runs.

Author: aliev

tests/test_chat_misc.py

@@ -1,3 +1,4 @@
+import datetime
 import time
 import uuid
 
@@ -394,12 +395,21 @@ def test_query_future_channel_bans(client: Stream, random_users):
     "messaging", "livestream", "team", "gaming", "commerce",
 })
 
+_STALE_THRESHOLD = datetime.timedelta(minutes=2)
+
 
 def _cleanup_test_channel_types(client: Stream):
-    """Delete non-builtin channel types to free slots for test runs."""
+    """Delete stale non-builtin channel types to free slots for test runs.
+
+    Only deletes types older than 2 minutes to avoid interfering with
+    parallel runners that just created theirs.
+    """
+    now = datetime.datetime.now(datetime.timezone.utc)
     resp = client.chat.list_channel_types()
-    for name in resp.data.channel_types:
-        if name not in BUILTIN_CHANNEL_TYPES:
+    for name, config in resp.data.channel_types.items():
+        if name in BUILTIN_CHANNEL_TYPES:
+            continue
+        if config and (now - config.created_at) > _STALE_THRESHOLD:
             try:
                 client.chat.delete_channel_type(name=name)
             except Exception: