Initial implementation of Telegram AI customer support bot

Cloudflare Workers + Hono + D1 + KV + R2 stack with 4 specialized AI agents
(onboarding, troubleshoot, asset, billing), OpenAI function calling with
7 tool definitions, human escalation, pending action approval workflow,
feedback collection, audit logging, i18n (ko/en), and Workers AI fallback.

43 source files, 45 tests passing.

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

src/services/audit.ts

@@ -0,0 +1,48 @@
+import { createLogger } from '../utils/logger';
+
+const logger = createLogger('audit');
+
+interface CreateAuditLogParams {
+  actorId: number | null;
+  action: string;
+  resourceType: string;
+  resourceId?: string | null;
+  details?: string | null;
+  result: 'success' | 'failure';
+  requestId?: string | null;
+}
+
+export async function createAuditLog(
+  db: D1Database,
+  params: CreateAuditLogParams
+): Promise<void> {
+  try {
+    await db
+      .prepare(
+        `INSERT INTO audit_logs (actor_id, action, resource_type, resource_id, details, result, request_id)
+         VALUES (?, ?, ?, ?, ?, ?, ?)`
+      )
+      .bind(
+        params.actorId,
+        params.action,
+        params.resourceType,
+        params.resourceId ?? null,
+        params.details ?? null,
+        params.result,
+        params.requestId ?? null
+      )
+      .run();
+
+    logger.info('Audit log created', {
+      action: params.action,
+      resourceType: params.resourceType,
+      resourceId: params.resourceId,
+      result: params.result,
+    });
+  } catch (error) {
+    logger.error('Failed to create audit log', error as Error, {
+      action: params.action,
+      resourceType: params.resourceType,
+    });
+  }
+}