Agent Skills: workflow-maintenance-log

Maintain per-workflow developer logs in Obsidian when working on Galaxy workflows. Use whenever creating, version-bumping, fixing, or updating an IWC/Galaxy `.ga` workflow or its `-tests.yml`. Logs detailed changes, test YAML edits, and `planemo` invocation history so the correct planemo command (full `planemo test` vs fast `workflow_test_on_invocation`) is obvious without guessing. Triggers on any session that edits `.ga`, edits `-tests.yml`, runs `planemo test`/`planemo workflow_test_on_invocation`, or prepares an IWC PR.