Hardening: Restore V3 Search legacy compatibility and fix Hosted File specialized delete logic

- Restored legacy query aliases (qry_ae_obj_li__event, qry__event_file, etc.) across Event modules to fix build errors.
- Fixed Hosted File deletion logic in core__hosted_files.ts to use specialized /hosted_file/{id} endpoint with fake_delete support.
- Standardized ID field usage (hosted_file_id vs hosted_file_id_random) in Archive Content and Event File upload components.
- Updated TODO.md to reflect completed search restoration tasks.

src/lib/ae_events/ae_events__event_file.ts

@@ -330,6 +330,8 @@ export async function search__event_file({
     return result_li || [];
 }
 
+export const qry__event_file = search__event_file;
+
 export const properties_to_save = [
     'id',
     'event_file_id',