Truncate timestamps to minutes in dump filenames

Author: fprochazka

src/glab_discussion/commands/read.py

@@ -17,7 +17,7 @@
 def _discussion_filename(discussion: Discussion, user_cache: dict[int, UserInfo]) -> str:
     """Compute filename for a discussion dump file."""
     first = discussion.first_note
-    dt = sanitize_filename_part(first.created_at.split(".")[0])
+    dt = sanitize_filename_part(first.created_at[:16])
     user = user_cache.get(first.author_id)
     name = sanitize_filename_part(display_name(user) if user else first.author_username)
     if user and user.is_bot: