Apply one operation to many workflows

Applies a single operation to up to 200 workflows. It is BEST-EFFORT PER WORKFLOW and always answers 200 when the request itself is well formed: each id lands in succeeded or in failed with its own message, so one workflow that cannot be activated never blocks the rest. Always read the result body — a 200 does not mean every id worked.

Operations: activate runs the same publish validation and trigger registration as POST /api/workflows/{id}/publish (a workflow that fails validation fails only its own entry); pause takes a live workflow offline; delete deletes permanently, including its runs and their stored payloads; addTags MERGES the given tags into each workflow's existing set (deduplicated case-insensitively, refused per-workflow past 50 tags) — it does not replace, use PUT /api/workflows/{id}/tags for that; move files each workflow into folderId (send null to un-file).

This route does NOT accept Idempotency-Key. Every operation it offers is naturally repeatable except delete, whose second attempt simply fails that id.