refactor(server): plan 4 — trek-photos.repository.ts finishes its rename

3e Task 6 renamed the CLASS (TrekPhotosRepository -> TrekPhotoRegistrationService,
since the name collided with the generated ORM TrekPhotos.repository.ts) but
left the FILE and its test file's names unchanged. Renames both to
trek-photo-registration.service.ts / .test.ts.

The old path is kept as a thin re-export stub (the src/websocket.ts shape)
rather than repointed at every one of its ~20 importers in this pass: several
of those files sit in two sibling tasks' exclusively-owned windows on this
shared branch (Task 3's budget/packing/todo/accommodations/places ripple,
reached through tests/helpers/plugin-host.ts and mcp-test-controllers.ts;
Task 5c's held-back tests/unit/services/{trekPhotoMedia,conflictUpdate}.test.ts)
and are off limits here. Flagged for a follow-up once those tasks land: delete
the stub and repoint every remaining importer at ./trek-photo-registration.service.

server/src/nest/photos/trek-photo-registration.service.ts

@@ -31,6 +31,15 @@ import type { JourneyPhotosRepository } from '../../db/repositories/JourneyPhoto
  * .repository.ts`, also `TrekPhotosRepository`, per the `EntityRepositoryType`
  * convention every entity in this program follows). Same shape as the 3d
  * §18.3 `ReservationsReadRepository` → `ReservationsReadService` precedent.
+ *
+ * File/test renamed to match (Plan 4 Task 8a — 3e Task 6 renamed only the
+ * class). The old path, `trek-photos.repository.ts`, is kept as a thin
+ * re-export stub (the same `src/websocket.ts` shape) rather than updated at
+ * every one of its ~20 importers in this pass: several of those files sit in
+ * two sibling tasks' exclusively-owned windows on this shared branch (Task
+ * 3's `nest/{budget,packing,todo,accommodations,places}/**` ripple and Task
+ * 5c's held-back test files) and are off limits here. The stub can be
+ * deleted and every importer repointed once those tasks land.
  */
 @Injectable()
 export class TrekPhotoRegistrationService {

server/src/nest/photos/trek-photos.repository.ts

@@ -0,0 +1,17 @@
+/**
+ * Legacy re-export stub (the same shape `src/websocket.ts` is) — the real
+ * implementation moved to `trek-photo-registration.service.ts` (Plan 4 Task
+ * 8a: 3e Task 6 renamed the CLASS off `TrekPhotosRepository` because it
+ * collided with the generated ORM `TrekPhotos.repository.ts`, but left the
+ * FILE and test names unchanged; this finishes that rename).
+ *
+ * Kept here only because several importers of this path currently sit in
+ * two sibling tasks' exclusively-owned file windows on this shared branch
+ * (Task 3's `nest/{budget,packing,todo,accommodations,places}/**` ripple,
+ * which reaches this file through `tests/helpers/plugin-host.ts` and
+ * `mcp-test-controllers.ts`; Task 5c's held-back
+ * `tests/unit/services/{trekPhotoMedia,conflictUpdate}.test.ts`) and cannot
+ * be edited here. Delete this stub and repoint every remaining importer at
+ * `./trek-photo-registration.service` once those tasks land.
+ */
+export { TrekPhotoRegistrationService } from './trek-photo-registration.service';