feat(mcp): add MCP Server Integration — Property Search, Analytics, Valuation

Implement 3 MCP servers in libs/mcp-servers/ using @modelcontextprotocol/sdk:

- Property Search: NL search via Typesense, property comparison, detail lookup
- Market Analytics: market reports, price trends, district comparison
- Valuation: AVM integration with Python AI service, feature extraction, batch valuation

Includes NestJS integration module with SSE transport for in-process hosting.

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

apps/api/src/modules/search/search.module.ts

@@ -40,7 +40,7 @@ const QueryHandlers = [SearchPropertiesHandler, GeoSearchHandler];
     ...CommandHandlers,
     ...QueryHandlers,
   ],
-  exports: [ListingIndexerService, SEARCH_REPOSITORY],
+  exports: [ListingIndexerService, SEARCH_REPOSITORY, TypesenseClientService],
 })
 export class SearchModule implements OnModuleInit {
   constructor(