Add multi-account support and CORS/logging middleware

- Add garfield, sales, leads, founder accounts to IMAP and SMTP configs
- Refactor fetcherpay config into shared helper functions
- Add CORS middleware with wildcard origin
- Add request logging middleware and MCP session lifecycle logs
- Include package-lock.json and add @types/cors dependency

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

src/tools.ts

@@ -5,8 +5,8 @@ import { sendEmail, createDraft } from './smtp.js';
 const ACCOUNT_PARAM = {
   account: {
     type: 'string',
-    enum: ['yahoo', 'fetcherpay'],
-    description: 'Which mailbox to use: "yahoo" (gheron01@yahoo.com) or "fetcherpay" (garfield.heron@fetcherpay.com). Defaults to "yahoo".',
+    enum: ['yahoo', 'fetcherpay', 'garfield', 'sales', 'leads', 'founder'],
+    description: 'Which mailbox to use: "yahoo" (gheron01@yahoo.com), "fetcherpay" (garfield.heron@fetcherpay.com), "garfield" (garfield@fetcherpay.com), "sales" (sales@fetcherpay.com), "leads" (leads@fetcherpay.com), or "founder" (founder@fetcherpay.com). Defaults to "yahoo".',
   },
 };