GET /admin/users returns every user's email address; compliance
regimes commonly require admin PII access to be logged, so the list
read now emits admin.users.listed. The admin gate additionally emits
admin.access.denied (outcome=failure, with method and path) whenever
an authenticated user without the instance-admin flag probes an
/admin/* route — dispatched directly with the request context since
there is no transaction.
Both entries have no single affected resource, so the entry target is
now omitted when empty instead of serialising a zero value.
Neither the v1 nor the v2 admin handlers called events.DispatchPending
after commit, so events queued via DispatchOnCommit were silently
dropped: admin-created users never fired user.created (no webhook,
notification or audit entry) and mode=now user deletion dropped the
cascaded project.deleted events. Each dropped queue also leaked an
entry in the pendingEvents map keyed on the dead session.
Dispatch after commit, clean up on rollback, and thread the real
request context through the v2 handlers so request metadata flows onto
the events.
