Swagger docs + Error tracking + Email + Production keystore

- Swagger UI at /docs (70+ routes documented)
- Error tracking: error_logs table, /errors/report, /errors/recent, /errors/stats
- Global error handler logs to DB
- Email: nodemailer, /email/send, /email/reminder (SMTP placeholder)
- Production keystore: RSA 2048, valid 2053, info.hasdo.taskteam

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

api/package-lock.json

@@ -21,6 +21,7 @@
         "dotenv": "^17.3.1",
         "fastify": "^5.8.4",
         "ioredis": "^5.10.1",
+        "nodemailer": "^8.0.4",
         "passport": "^0.7.0",
         "passport-facebook": "^3.0.0",
         "passport-google-oauth20": "^2.0.0",
@@ -1392,6 +1393,15 @@
         "node-gyp-build-test": "build-test.js"
       }
     },
+    "node_modules/nodemailer": {
+      "version": "8.0.4",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-8.0.4.tgz",
+      "integrity": "sha512-k+jf6N8PfQJ0Fe8ZhJlgqU5qJU44Lpvp2yvidH3vp1lPnVQMgi4yEEMPXg5eJS1gFIJTVq1NHBk7Ia9ARdSBdQ==",
+      "license": "MIT-0",
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
     "node_modules/nodemon": {
       "version": "3.1.14",
       "resolved": "https://registry.npmjs.org/nodemon/-/nodemon-3.1.14.tgz",