ci: collapse author_association OR chains into contains(fromJSON(...))

Per review feedback on PR #1270: replace the three-way `==` OR chain in
each of the four trigger branches with a single contains(fromJSON(...))
check against a shared list. Same semantics, less duplication, and the
allowed-roles list is now defined once per branch instead of three times.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: cliffhall

.github/workflows/claude.yml

@@ -16,24 +16,16 @@ jobs:
       (
         (github.event_name == 'issue_comment' &&
           contains(github.event.comment.body, '@claude') &&
-          (github.event.comment.author_association == 'OWNER' ||
-           github.event.comment.author_association == 'MEMBER' ||
-           github.event.comment.author_association == 'COLLABORATOR')) ||
+          contains(fromJSON('["OWNER", "MEMBER", "COLLABORATOR"]'), github.event.comment.author_association)) ||
         (github.event_name == 'pull_request_review_comment' &&
           contains(github.event.comment.body, '@claude') &&
-          (github.event.comment.author_association == 'OWNER' ||
-           github.event.comment.author_association == 'MEMBER' ||
-           github.event.comment.author_association == 'COLLABORATOR')) ||
+          contains(fromJSON('["OWNER", "MEMBER", "COLLABORATOR"]'), github.event.comment.author_association)) ||
         (github.event_name == 'pull_request_review' &&
           contains(github.event.review.body, '@claude') &&
-          (github.event.review.author_association == 'OWNER' ||
-           github.event.review.author_association == 'MEMBER' ||
-           github.event.review.author_association == 'COLLABORATOR')) ||
+          contains(fromJSON('["OWNER", "MEMBER", "COLLABORATOR"]'), github.event.review.author_association)) ||
         (github.event_name == 'issues' &&
           (contains(github.event.issue.body, '@claude') || contains(github.event.issue.title, '@claude')) &&
-          (github.event.issue.author_association == 'OWNER' ||
-           github.event.issue.author_association == 'MEMBER' ||
-           github.event.issue.author_association == 'COLLABORATOR'))
+          contains(fromJSON('["OWNER", "MEMBER", "COLLABORATOR"]'), github.event.issue.author_association))
       )
     runs-on: ubuntu-latest
     permissions: