fix: ensure manually tagged faces have proper source type (#16364)

immich-app/immich#16062 added manual face tagging and deletion, but did
not add a new 'SourceType'. The create faces would default to
'machine-learning' which is incorrect, and has the annoying downside
that they will be wiped when the 'Refresh Faces' job is run.

Handling of non-machine-learning faces was previously added in
immich-app/immich#6455. This PR simply extends it to the new manually
tagged faces.

server/src/services/person.service.ts

@@ -736,6 +736,7 @@ export class PersonService extends BaseService {
       boundingBoxX2: dto.x + dto.width,
       boundingBoxY1: dto.y,
       boundingBoxY2: dto.y + dto.height,
+      sourceType: dto.sourceType,
     });
   }