feat(api): add /v1/maintenance policies and run endpoints

OpenAPI, httpapi CRUD/run/dry-run, job maintenance_policy_run и audit с policy_id.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/jobs/worker.go

@@ -61,6 +61,7 @@ const (
 	KindPostgresAnalyze        = "postgres_analyze"
 	KindPostgresReindex        = "postgres_reindex"
 	KindPostgresCleanup        = "postgres_cleanup"
+	KindMaintenancePolicyRun   = "maintenance_policy_run"
 )
 
 // Worker executes queued jobs against store.Backend (memory or SQL).
@@ -188,6 +189,8 @@ func (w *Worker) Process(j *Job) {
 		w.runPostgresMaint(j, "reindex")
 	case KindPostgresCleanup:
 		w.runPostgresCleanup(j)
+	case KindMaintenancePolicyRun:
+		w.runMaintenancePolicy(j)
 	default:
 		j.Fail("unknown job kind")
 	}