fix(server): regenerate missing person thumbnails (#3970)

* Regenerate missing person thumbnails

* Check for empty string instead of zero length

* Remember asset used as person face

* Define entity relation between person and asset via faceAssetId

* Typo

* Fix entity relation

* Tests

* Tests

* Fix code formatting

* Fix import path

* Fix migration

* format

* Fix entity and migration

* Linting

* Remove unneeded cast

* Conventions

* Simplify queries

* Simplify queries

* Remove unneeded typings from entity

* Remove unneeded cast

---------

Co-authored-by: Alex <alex.tran1502@gmail.com>

server/test/repositories/person.repository.mock.ts

@@ -4,6 +4,8 @@ export const newPersonRepositoryMock = (): jest.Mocked<IPersonRepository> => {
   return {
     getById: jest.fn(),
     getAll: jest.fn(),
+    getAllWithoutThumbnail: jest.fn(),
+    getAllForUser: jest.fn(),
     getAssets: jest.fn(),
     getAllWithoutFaces: jest.fn(),
 
@@ -13,6 +15,7 @@ export const newPersonRepositoryMock = (): jest.Mocked<IPersonRepository> => {
     delete: jest.fn(),
 
     getFaceById: jest.fn(),
+    getRandomFace: jest.fn(),
     prepareReassignFaces: jest.fn(),
     reassignFaces: jest.fn(),
   };