fix: degrade to a one-tap PR link when policy blocks Actions PRs

Third live run (#50): filing, gate and push all green; gh pr create
was refused by 'GitHub Actions is not permitted to create or approve
pull requests'. When that policy is on, comment the compare link
instead of failing the whole filing.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01K21CJX9TAgULDo1fFJtonc

Author: 2 people

.github/workflows/queue_filing.yml

@@ -169,11 +169,17 @@ jobs:
             echo
             echo "Closes #${ISSUE}."
           } > /tmp/pr_body.md
-          gh pr create --base main --head "$branch" \
-            --title "queue filing: paper from #${ISSUE}" \
-            --body-file /tmp/pr_body.md
-          gh issue comment "$ISSUE" --body \
-            "Filing PR opened: $(gh pr view "$branch" --json url --jq .url). Review and merge to complete the intake."
+          if gh pr create --base main --head "$branch" \
+              --title "queue filing: paper from #${ISSUE}" \
+              --body-file /tmp/pr_body.md; then
+            gh issue comment "$ISSUE" --body \
+              "Filing PR opened: $(gh pr view "$branch" --json url --jq .url). Review and merge to complete the intake."
+          else
+            # Repo/org policy can forbid Actions-created PRs. The branch is
+            # pushed and gated — degrade to a one-tap PR link, not a failure.
+            gh issue comment "$ISSUE" --body \
+              "Filing branch pushed and gated: \`${branch}\` — but this repo's policy blocks Actions from opening PRs. Open it with one tap: ${GITHUB_SERVER_URL}/${GH_REPO}/compare/main...${branch}?expand=1 — or enable 'Allow GitHub Actions to create and approve pull requests' (Settings → Actions → General) to make this automatic."
+          fi
 
       - name: Report failure on the issue
         if: failure()