feat(server): separate face search relation (#10371)

* wip

* various fixes

* new migration

* fix test

* add face search entity, update sql

* update e2e

* set storage to external

server/src/entities/face-search.entity.ts

@@ -0,0 +1,21 @@
+import { AssetFaceEntity } from 'src/entities/asset-face.entity';
+import { asVector } from 'src/utils/database';
+import { Column, Entity, Index, JoinColumn, OneToOne, PrimaryColumn } from 'typeorm';
+
+@Entity('face_search', { synchronize: false })
+export class FaceSearchEntity {
+  @OneToOne(() => AssetFaceEntity, { onDelete: 'CASCADE', nullable: true })
+  @JoinColumn({ name: 'faceId', referencedColumnName: 'id' })
+  face?: AssetFaceEntity;
+
+  @PrimaryColumn()
+  faceId!: string;
+
+  @Index('face_index', { synchronize: false })
+  @Column({
+    type: 'float4',
+    array: true,
+    transformer: { from: (v) => JSON.parse(v), to: (v) => asVector(v) },
+  })
+  embedding!: number[];
+}