fix: move comments out of workflow if: expression block

Forgejo runner's expression parser rejects '#' characters inside
if: | blocks (run 52778: "unexpected character '#' while lexing
expression"). Move all comments above the if: key and switch from
block scalar (|) to folded scalar (>-) to avoid multiline issues.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.forgejo/workflows/claude.yml

@@ -26,13 +26,7 @@ jobs:
     #     despite action being 'labeled'). Let all through; trigger.ts validates.
     if: >-
       (github.event_name == 'issue_comment' && contains(github.event.comment.body, '@claude')) ||
-      # Forgejo collapses both pull_request_review_comment AND pull_request_review
-      # into pull_request_comment. We cannot gate on @claude here because Forgejo's
-      # webhook payload does not populate github.event.comment.body or
-      # github.event.review.body for these events (tested: run 12084 was skipped).
-      # The @claude check is handled in trigger.ts which reads the actual payload.
       (github.event_name == 'pull_request_review_comment' || github.event_name == 'pull_request_comment') ||
-      # This condition only fires on GitHub (Forgejo never sends pull_request_review).
       (github.event_name == 'pull_request_review' && contains(github.event.review.body, '@claude')) ||
       (github.event_name == 'issues')
     runs-on: grunt