request_approval() appended the Approval row to the live projection
before the daemon tried to persist it. On append failure the pending
nonce was cancelled but the row stayed in the in-memory transcript, so
a WebSocket snapshot taken afterward showed a row durable replay could
never reproduce.
Add Projection::rollback_row to undo the append and call it alongside
the existing cancel_pending_approvals on failure. Extract the pump's
per-request handling into record_permission_request so the failure
path is directly testable without a live ACP connection.
Fault-injection regression tests use a read-only file handle
(EventLog::for_test, cfg(test)) to force append() to fail
deterministically, then assert the live snapshot and durable replay
agree (both empty) and a subsequent request still persists and
replays correctly.
Fixes#184.
Miguel Palhas
c067f48a24