phase-9: domain-driven architecture complete

- Restructured server layer with 5 domains: shared, screener, portfolio, calls, finance
- Migrated 58 TypeScript files to domain-driven structure
- Updated CLAUDE.md with new architecture documentation
- Added .gitignore rules for .md files (except CLAUDE.md)
- Removed unused CatalystAnalyst import from app.ts
- Fixed lint errors: removed unused imports, fixed regex escape, added console suppressions
- Verified no sensitive data in git history
- Server code compiles cleanly with TypeScript strict mode

server/domains/shared/entities/Bond.ts

@@ -0,0 +1,32 @@
+import { CREDIT_RATING_SCALE } from '../scoring/ScoringConfig';
+import { Asset } from './Asset';
+import type { BondData, BondMetrics } from '../types/index';
+
+export class Bond extends Asset {
+  metrics: BondMetrics;
+
+  constructor(data: BondData) {
+    super(data);
+
+    const creditRating = data.creditRating || 'BBB';
+    const creditRatingNumeric = CREDIT_RATING_SCALE[creditRating] ?? 7;
+
+    this.metrics = {
+      ytm: parseFloat(String(data.yieldToMaturity)) || 0,
+      duration: parseFloat(String(data.duration)) || 0,
+      creditRating,
+      creditRatingNumeric,
+    };
+  }
+
+  getDisplayMetrics(): Record<string, string> {
+    return {
+      Ticker: this.ticker,
+      Type: 'BOND',
+      Price: this.formatCurrency(this.currentPrice),
+      'YTM%': `${this.metrics.ytm.toFixed(2)}%`,
+      Duration: this.metrics.duration.toFixed(1),
+      Rating: `${this.metrics.creditRating} (${this.metrics.creditRatingNumeric})`,
+    };
+  }
+}