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/dtos/person.dto.ts

@@ -1,6 +1,6 @@
 import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
 import { Type } from 'class-transformer';
-import { IsArray, IsInt, IsNotEmpty, IsNumber, IsString, Max, Min, ValidateNested } from 'class-validator';
+import { IsArray, IsEnum, IsInt, IsNotEmpty, IsNumber, IsString, Max, Min, ValidateNested } from 'class-validator';
 import { DateTime } from 'luxon';
 import { PropertyLifecycle } from 'src/decorators';
 import { AuthDto } from 'src/dtos/auth.dto';
@@ -194,6 +194,10 @@ export class AssetFaceCreateDto extends AssetFaceUpdateItem {
   @IsNotEmpty()
   @IsNumber()
   height!: number;
+
+  @ApiProperty({ type: 'string', enum: SourceType, enumName: 'SourceType' })
+  @IsEnum(SourceType)
+  sourceType: SourceType = SourceType.MANUAL;
 }
 
 export class AssetFaceDeleteDto {