feat(server): search unknown place (#10866)

* Allow submission of null country

* Update searchAssetBuilder to handle nulls

andWhere({country:null}) produces `"exifInfo"."country" = NULL`. We want
`"exifInfo"."country" IS NULL`, so we have to treat NULL as a special
case

* Allow null country in frontend

* Make the query code a bit more straightforward

* Remove unused brackets import

* Remove log message

* Don't change whitespace for no reason

* Fix prettier style issue

* Update search.dto.ts validators per @jrasm91's recommendation

* Update api types

* Combine null country and state into one guard clause

* chore: clean up

* chore: add e2e for null/empty city, state, country search

* refactor: server returns suggestion for null values

* chore: clean up

---------

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>
Co-authored-by: Alex Tran <alex.tran1502@gmail.com>
Co-authored-by: Jason Rasmussen <jason@rasm.me>

server/src/dtos/search.dto.ts

@@ -1,6 +1,7 @@
 import { ApiProperty } from '@nestjs/swagger';
 import { Type } from 'class-transformer';
 import { IsEnum, IsInt, IsNotEmpty, IsString, Max, Min } from 'class-validator';
+import { PropertyLifecycle } from 'src/decorators';
 import { AlbumResponseDto } from 'src/dtos/album.dto';
 import { AssetResponseDto } from 'src/dtos/asset-response.dto';
 import { AssetOrder } from 'src/entities/album.entity';
@@ -75,34 +76,29 @@ class BaseSearchDto {
   takenAfter?: Date;
 
   @IsString()
-  @IsNotEmpty()
-  @Optional()
-  city?: string;
+  @Optional({ nullable: true, emptyToNull: true })
+  city?: string | null;
+
+  @IsString()
+  @Optional({ nullable: true, emptyToNull: true })
+  state?: string | null;
 
   @IsString()
   @IsNotEmpty()
-  @Optional()
-  state?: string;
+  @Optional({ nullable: true, emptyToNull: true })
+  country?: string | null;
 
   @IsString()
-  @IsNotEmpty()
-  @Optional()
-  country?: string;
-
-  @IsString()
-  @IsNotEmpty()
-  @Optional()
+  @Optional({ nullable: true, emptyToNull: true })
   make?: string;
 
   @IsString()
-  @IsNotEmpty()
-  @Optional()
-  model?: string;
+  @Optional({ nullable: true, emptyToNull: true })
+  model?: string | null;
 
   @IsString()
-  @IsNotEmpty()
-  @Optional()
-  lensModel?: string;
+  @Optional({ nullable: true, emptyToNull: true })
+  lensModel?: string | null;
 
   @IsInt()
   @Min(1)
@@ -242,6 +238,10 @@ export class SearchSuggestionRequestDto {
   @IsString()
   @Optional()
   model?: string;
+
+  @ValidateBoolean({ optional: true })
+  @PropertyLifecycle({ addedAt: 'v111.0.0' })
+  includeNull?: boolean;
 }
 
 class SearchFacetCountResponseDto {