Manage calls and the inbox through the API

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -1273,6 +1273,12 @@ GET    /api/v1/roles/catalogue     catálogo de permisos agrupado
        /api/v1/testimonials        CRUD + restore; filtros: is_public, client_id,
                                    project_id, service_id, search
        /api/v1/talks               CRUD (sin papelera, como en el panel)
+       /api/v1/calls               CRUD; technology_ids; filtros: status,
+                                   project_id, search
+GET    /api/v1/applications        el buzón; filtros: status (sin él, sin spam),
+                                   kind, call_id, search, trashed
+PATCH  /api/v1/applications/{id}   solo status y notes
+DELETE /api/v1/applications/{id}   + POST …/restore
 POST   /api/v1/media               subir una imagen (fichero o URL)
 ```