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Diego ImbertandClaude Opus 5 6f9457fc8e fix(datatables): confine roles to the instance database, and stop a fork reaching the parent's bookkeeping

A data table role is a login on Windmill's own Postgres. Nothing stopped a workspace admin
putting a *resource-backed* data table under roles, at which point the executor dialled the
host that resource names — one the admin chose — with the role's real cluster password, and
`CONNECT` is granted to every registered instance database. Both ends now refuse: the
permissions endpoint rejects the save, and the chokepoint refuses to substitute credentials
on a non-instance entry rather than trusting the record it read.

Two more places reached the governing database without answering to it. The initial-migration
generator returned a `pg_dump` of the whole schema to any member. And the migration
rename/delete cascade followed a fork's pointer into the parent, so a fork admin renaming or
removing their own local entry relabelled or wiped the parent's `_wm_migrations` — after
which the parent re-runs every migration from zero. The remote half is now skipped when the
entry resolves into another workspace, which is also just correct: a fork renaming what it
calls a data table changes nothing about the data table.

Also: revoking a tenant now bounces the replication streams of every workspace holding an
entry that resolves here, not only the governing one, so a fork's trigger stops rather than
living on inside its open connection; the instance role catalog and the governing workspace's
tenant lists are no longer returned to someone who cannot edit them; and the tenant rename
dedup collapses non-adjacent duplicates, per role rather than once any role changed.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012ti5HyeTikPMYyW8YSdiHR

2026-09-16 15:14:28 +02:00