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>

db/init/00-init.sql

@@ -73,6 +73,19 @@ CREATE TABLE shared.invitations (
     created_at TIMESTAMPTZ DEFAULT NOW()
 );
 
+-- CD Rates (cross-tenant market data for investment recommendations)
+CREATE TABLE shared.cd_rates (
+    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+    bank_name VARCHAR(255) NOT NULL,
+    apy DECIMAL(6,4) NOT NULL,
+    min_deposit DECIMAL(15,2),
+    term VARCHAR(100) NOT NULL,
+    term_months INTEGER,
+    fetched_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    source_url VARCHAR(500),
+    created_at TIMESTAMPTZ DEFAULT NOW()
+);
+
 -- Indexes
 CREATE INDEX idx_user_orgs_user ON shared.user_organizations(user_id);
 CREATE INDEX idx_user_orgs_org ON shared.user_organizations(organization_id);
@@ -80,3 +93,5 @@ CREATE INDEX idx_users_email ON shared.users(email);
 CREATE INDEX idx_orgs_schema ON shared.organizations(schema_name);
 CREATE INDEX idx_invitations_token ON shared.invitations(token);
 CREATE INDEX idx_invitations_email ON shared.invitations(email);
+CREATE INDEX idx_cd_rates_fetched ON shared.cd_rates(fetched_at DESC);
+CREATE INDEX idx_cd_rates_apy ON shared.cd_rates(apy DESC);