fix: limit check workflow push trigger - #2

What T-Rex did

• Reviewed the pre-trigger run and confirmed the workflow had push and pull_request but no branches, consistent with the main restriction.
• Reviewed the post-trigger run and confirmed the workflow now has push branches exactly [main] and a pull_request present.
• Ran bun check and observed it completed but halted due to Prettier warnings for unrelated .greptile-internal/.greptile files.
• Collected artifacts including the pre/post workflow logs, bun check log, an additional log artifact, and a JavaScript artifact to support review.

_{Ran code and verified through T-Rex}