Phase 5: AI investment planning - CD rate fetcher and AI recommendation engine

- Add shared.cd_rates table for cross-tenant market data (CD rates from Bankrate)
- Create standalone Puppeteer scraper script (scripts/fetch-cd-rates.ts) for cron-based rate fetching
- Add investment-planning backend module with 3 endpoints: snapshot, cd-rates, recommendations
- AI service gathers tenant financial data (accounts, investments, budgets, projects, cash flow) and calls OpenAI-compatible API (NVIDIA endpoint) for structured investment recommendations
- Create InvestmentPlanningPage with summary cards, current investments table, market CD rates table, and AI recommendation accordion
- Add Investment Planning to sidebar under Planning menu
- Configure AI_API_URL, AI_API_KEY, AI_MODEL environment variables

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/src/modules/investment-planning/investment-planning.controller.ts

@@ -0,0 +1,30 @@
+import { Controller, Get, Post, UseGuards } from '@nestjs/common';
+import { ApiTags, ApiBearerAuth, ApiOperation } from '@nestjs/swagger';
+import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard';
+import { InvestmentPlanningService } from './investment-planning.service';
+
+@ApiTags('investment-planning')
+@Controller('investment-planning')
+@ApiBearerAuth()
+@UseGuards(JwtAuthGuard)
+export class InvestmentPlanningController {
+  constructor(private service: InvestmentPlanningService) {}
+
+  @Get('snapshot')
+  @ApiOperation({ summary: 'Get financial snapshot for investment planning' })
+  getSnapshot() {
+    return this.service.getFinancialSnapshot();
+  }
+
+  @Get('cd-rates')
+  @ApiOperation({ summary: 'Get latest CD rates from market data' })
+  getCdRates() {
+    return this.service.getCdRates();
+  }
+
+  @Post('recommendations')
+  @ApiOperation({ summary: 'Get AI-powered investment recommendations' })
+  getRecommendations() {
+    return this.service.getAIRecommendations();
+  }
+}