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>
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