feat(api): add price history, Stringee SMS, Zalo OA, WebSocket notifications, and feature-listing command

- Add PriceHistory model + migration, price-changed domain event, and event handler
- Add GetPriceHistory query handler and controller endpoint
- Implement StringeeSmsService and ZaloOaService with unit tests
- Add Zalo ZNS templates for Vietnamese notification messages
- Add WebSocket notification gateway for real-time push
- Add FeatureListingCommand for promoted listings
- Apply remaining consistent-type-imports lint fixes across API modules

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/modules/search/presentation/controllers/search.controller.ts

@@ -5,7 +5,7 @@ import {
   Query,
   UseGuards,
 } from '@nestjs/common';
-import { CommandBus, QueryBus } from '@nestjs/cqrs';
+import { type CommandBus, type QueryBus } from '@nestjs/cqrs';
 import {
   ApiTags,
   ApiOperation,
@@ -15,12 +15,12 @@ import {
 import { Roles, JwtAuthGuard, RolesGuard } from '@modules/auth';
 import { EndpointRateLimit, EndpointRateLimitGuard } from '@modules/shared';
 import { ReindexAllCommand } from '../../application/commands/reindex-all/reindex-all.command';
-import { ReindexResult } from '../../application/commands/reindex-all/reindex-all.handler';
+import { type ReindexResult } from '../../application/commands/reindex-all/reindex-all.handler';
 import { GeoSearchQuery } from '../../application/queries/geo-search/geo-search.query';
 import { SearchPropertiesQuery } from '../../application/queries/search-properties/search-properties.query';
-import { SearchResult } from '../../domain/repositories/search.repository';
-import { GeoSearchDto } from '../dto/geo-search.dto';
-import { SearchPropertiesDto } from '../dto/search-properties.dto';
+import { type SearchResult } from '../../domain/repositories/search.repository';
+import { type GeoSearchDto } from '../dto/geo-search.dto';
+import { type SearchPropertiesDto } from '../dto/search-properties.dto';
 
 @ApiTags('search')
 @Controller('search')