docs(idaa): track contact_li_json_ext search gap + message sent to backend

- TODO__Agents.md: added task for contact search — backend to whitelist
  contact_li_json_ext in event search, frontend to add OR condition in
  search__event() and update local IDB fast-path filter. Blocked on backend.

- CLIENT__IDAA_and_customized_mods.md: documented the search architecture
  gap under Recovery Meetings — what default_qry_str contains, why
  contact_li_json is unsearchable as raw JSON, what contact_li_json_ext is
  and what needs to happen to enable contact name/email search.

Backend agent notified via ae_send_message 2026-04-08.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

documentation/TODO__Agents.md

@@ -85,6 +85,21 @@ suddenly jumps to 0 errors, verify it's not because a bad `.d.ts` replaced a pac
   Run `npx svelte-check 2>&1 | grep ModalProps` to get the current list.
   Fix pattern: replace `children` prop binding with Svelte snippet syntax per flowbite-svelte docs.
 
+- [ ] **[IDAA] Make `contact_li_json_ext` searchable — Recovery Meeting contact search (2026-04-08)**
+  Members cannot search for meetings by contact name or email. `contact_li_json` data is not
+  included in `default_qry_str` and MariaDB cannot substring-search a JSON longtext directly.
+  The `event` table already has `contact_li_json_ext` (STORED GENERATED, indexed) to work around this.
+
+  **Backend (blocked on this first):** Add `contact_li_json_ext` to the searchable fields
+  whitelist for the `event` object type — likely a one-line change in `ae_obj_types_def.py`
+  or the event object definition. Message sent to backend agent 2026-04-08.
+
+  **Frontend (after backend ships):**
+  - `src/lib/ae_events/ae_events__event.ts` → `search__event()`: add `contact_li_json_ext`
+    as an OR condition alongside `default_qry_str` when `qry_str` is present.
+  - `src/routes/idaa/(idaa)/recovery_meetings/+page.svelte` fast-path IDB filter: parse
+    `contact_li_json` and include contact names/emails in the local text match check.
+
 - [ ] **[IDAA / Events] Audit `default_qry_str` coverage in other event search pages.**
   The backend was updated 2026-03-31 to expose `default_qry_str` in API responses.
   Frontend fix applied to Recovery Meetings (`+page.svelte` + `properties_to_save`).