feat(12.1-01): declared record actions with an applicability rule

- pact.HasAdminRecordActions with AdminRecordAction (Applies, Run)
- config_form.yaml recordActions, compiled fail-loud
- show response meta.actions lists the permitted actions that apply
- POST .../{controller}/{id}/actions/{action}: record loaded and locked
  through the form scope; 404 out of scope, 409 when it does not apply
- RecordActions.vue with confirm and request flow (mounted by plan 02)
- roster fixture, smoke tests, OpenAPI, TS types, READMEs, docs

modules/phrasebook/backend/lang/en/lang.yaml

@@ -91,6 +91,9 @@ form:
   tab_errors:
     one: ":count error"
     other: ":count errors"
+  action_confirm: "Run “:action” on this record?"
+  action_done: Action completed.
+  action_stale: This action no longer applies to this record. The page has been refreshed.
 relation:
   add: Add
   link: Link