test(api): add domain layer unit tests across all modules

Cover admin events, notifications, reviews, search VOs, listings (property,
media, events, price/geo/address VOs), auth events, payment events,
subscription events, and analytics events. Raises domain test coverage
from ~24% to ~75%.

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

libs/mcp-servers/src/index.ts

@@ -3,6 +3,9 @@ export { createPropertySearchServer } from './property-search/property-search.se
 export { createMarketAnalyticsServer } from './market-analytics/market-analytics.server';
 export { createValuationServer } from './valuation/valuation.server';
 
+// MCP SDK re-exports (for host apps that build custom controllers)
+export { SSEServerTransport } from '@modelcontextprotocol/sdk/server/sse.js';
+
 // NestJS integration
 export { McpModule, type McpModuleOptions, MCP_MODULE_OPTIONS } from './nestjs/mcp.module';
 export { McpRegistryService } from './nestjs/mcp-registry.service';