fix(master): review fixes for drift restore and accept (#10)

internal/master/store/migrations/0005_drift_merge.sql

@@ -1,7 +1,7 @@
--- true from a successful job until the next inventory write for the row: the
+-- True from a successful job until the next inventory write for the row. The
 -- agent's upsert arrives a debounce interval after job.result, and until then
 -- desired_ref is newer than actual_ref without the service having drifted.
 ALTER TABLE services ADD COLUMN awaiting_inventory boolean NOT NULL DEFAULT false;
 
--- move suggestions look up Compose rows by project + service across agents
+-- Move suggestions look up Compose rows by project and service across agents.
 CREATE INDEX services_by_compose_name ON services (compose_project, compose_service) WHERE kind = 'compose';

internal/master/store/services.go

@@ -259,8 +259,8 @@ func (s *Store) SetPollError(ctx context.Context, ids []int64, msg string) error
 }
 
 // SetLastTagDigest sets last_tag_digest; see model.Service.LastTagDigest. The
-// poller calls it, and FinishJob sets the same column after a tag job.
-// Inventory writes never change it.
+// poller and jobs.RestoreDesired call it, and FinishJob sets the same column
+// after a tag job. Inventory writes never change it.
 func (s *Store) SetLastTagDigest(ctx context.Context, id int64, digest string) error {
 	if _, err := s.pool.Exec(ctx,
 		`UPDATE services SET last_tag_digest = $2 WHERE id = $1`, id, digest); err != nil {