fix(release): handle GitHub PR number suffix in commit message check (#145)

GitHub appends (#NNN) to squash merge commit titles, which caused the
Phase 2 release regex to fail and skip auto-tagging.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: mdelapenya

.github/workflows/release.yml

@@ -162,7 +162,7 @@ jobs:
         #   - Squash merge: PR title is the subject line
         #   - Regular merge: PR title appears in the body
         #   - Rebase merge: original commit message is preserved
-        if echo "$COMMIT_MESSAGES" | grep -qE '^chore\((release|[a-z0-9_-]+)\): bump (module )?versions?[[:space:]]*$'; then
+        if echo "$COMMIT_MESSAGES" | grep -qE '^chore\((release|[a-z0-9_-]+)\): bump (module )?versions?([[:space:]]|\(#[0-9]+\))*$'; then
           echo "✅ Push contains a release commit — proceeding with tagging"
           echo "is_release=true" >> "$GITHUB_OUTPUT"
         else