Fix red develop a9d747fab81b

The merge lane found `develop` red at `a9d747fab81bdb188f28da50ac8e5963382fe753` on its own: no queued PR merges until it is fixed. Failing (tests and gate stages): - `org-transfer-rule-tables` The whole gate log: artifact `15289` on lane task 13420. Make `develop` pass its full gate again. Open a PR as usual: the merge lane merges a PR that fixes some of these and adds no failure even while `develop` is red.

Fixed red develop (org-transfer-rule-tables): gave PR #7877's gmail/slack/project_mcp_links credential refs org-transfer policies. Rule test 57/57, transfer suites 73 pass, quick gate green; PR #7880 queued to merge lane. Memory: none applied.