Completes the CRUD loop for operator-creatable adapters. Operators can
now create generic_http instances (GET+POST /adapters/new) and delete
operator instances (POST /adapters/{name}/delete) without editing Python.
Key changes:
- SourceAdapter.operator_creatable class attr (default False); set True on
GenericHttpAdapter so it appears in the kind select
- ADAPTER_CREATE / ADAPTER_DELETE audit constants
- _parse_adapter_settings() shared helper extracted from adapters_edit_submit
(single place for widget parsing, region handling, Pydantic validation,
quota blocking) — edit_submit refactored to call it
- GET/POST /adapters/new: kind select → name/cadence/enabled → settings fields;
INSERT with kind supplied explicitly; 302 → edit page on success
- POST /adapters/{name}/delete: primary guard (name in adapter_classes → 403);
second guard (kind not operator_creatable → 403); DELETE + audit; 302 → list
- adapters_list.html: "New adapter" button; per-row Delete form (operator
instances only; built-ins have no button); deletable flag passed from route
- adapters_new.html: new template reusing same field-rendering blocks as
adapters_edit.html; enabled checkbox unchecked by default
- 46 new tests (all pass; mock-DB pattern mirrors test_gui_adapter_edit.py)
Co-authored-by: Ubuntu <zvx@cortex.echo6.co>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
