Uninstall deleted the plugin row and then up to fourteen tables of rows
about it one by one. A failure halfway left grants, scheduled tasks or
per-user settings behind for a later plugin that reuses the id to
inherit. The rows now go in one transaction, and the data directory is
removed after the commit instead of before the rows that describe it.
A registry install records the discovered row, its provenance, the
pinned author key and the cleared update block together, so a failure
never leaves a registered plugin without its pinned key. Starting an
OAuth connect drops the stale state and stores the fresh one together,
and a disconnect drops tokens and state together; PluginOAuthService
takes the UnitOfWork for that. The scheduler's per-task claims stay
separate on purpose and say so for the transaction gate.
Maurice
f76538b2b2