added offline inquiry in system setting also fix some bugs

src/system-settings/dto/system-settings.dto.ts

@@ -13,12 +13,38 @@ export class ExternalApisSettingsDto {
   sandHubUseLiveApi?: boolean;
 }
 
+export class OfflineInquirySettingsDto {
+  @ApiPropertyOptional({
+    description:
+      "Master switch for seeded offline plate inquiries. When false, `offlineInquiries` hits are skipped.",
+    example: true,
+  })
+  @IsOptional()
+  @IsBoolean()
+  enabled?: boolean;
+}
+
 export class UpdateSystemSettingsDto {
   @ApiPropertyOptional({ type: ExternalApisSettingsDto })
   @IsOptional()
   @ValidateNested()
   @Type(() => ExternalApisSettingsDto)
   externalApis?: ExternalApisSettingsDto;
+
+  @ApiPropertyOptional({ type: OfflineInquirySettingsDto })
+  @IsOptional()
+  @ValidateNested()
+  @Type(() => OfflineInquirySettingsDto)
+  offlineInquiry?: OfflineInquirySettingsDto;
+}
+
+export class UpdateOfflineInquirySettingsDto {
+  @ApiProperty({
+    description: "Enable or disable offline seeded plate inquiries globally",
+    example: true,
+  })
+  @IsBoolean()
+  enabled: boolean;
 }
 
 export class ExternalApisSettingsViewDto {
@@ -30,6 +56,15 @@ export class ExternalApisSettingsViewDto {
   sandHubUseLiveApi: boolean;
 }
 
+export class OfflineInquirySettingsViewDto {
+  @ApiProperty({
+    description:
+      "Stored in `system_settings.offlineInquiry.enabled` — when false, offline seeds are ignored",
+    example: true,
+  })
+  enabled: boolean;
+}
+
 export class SystemSettingsResponseDto {
   @ApiProperty({ example: "global" })
   key: string;
@@ -37,6 +72,9 @@ export class SystemSettingsResponseDto {
   @ApiProperty({ type: ExternalApisSettingsViewDto })
   externalApis: ExternalApisSettingsViewDto;
 
+  @ApiProperty({ type: OfflineInquirySettingsViewDto })
+  offlineInquiry: OfflineInquirySettingsViewDto;
+
   @ApiProperty({
     description: "Human-readable mode for operators",
     example: "mock",