Don't crash if periodic session access fails

If saving every minute or new entities fails, it's not fatal.
Other places are not checked because it is more critical for
information to be saved, such as disconnect, where we want to
crash if the session cannot be accessed.

telethon/client/updates.py

@@ -393,7 +393,11 @@ class UpdateMethods:
             # inserted because this is a rather expensive operation
             # (default's sqlite3 takes ~0.1s to commit changes). Do
             # it every minute instead. No-op if there's nothing new.
-            await self.session.save()
+            try:
+                await self.session.save()
+            except OSError as e:
+                # No big deal if this cannot be immediately saved
+                self._log[__name__].warning('Could not perform the periodic save of session data: %s: %s', type(e), e)
 
     async def _dispatch_update(self: 'TelegramClient', update):
         # TODO only used for AlbumHack, and MessageBox is not really designed for this