Add channel log for error with line attachments

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 74.22%. Comparing base (eee6313) to head (59765cb).

Files	Patch %	Lines
handlers/line/handler.go	0.00%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #711 +/- ## ========================================== - Coverage 74.24% 74.22% -0.02% ========================================== Files 110 110 Lines 13325 13327 +2 ========================================== - Hits 9893 9892 -1 - Misses 2718 2720 +2 - Partials 714 715 +1 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.