Complete folder anatomy for all 649 cybersecurity skills + update LICENSE to Mahipal

- Add scripts/agent.py and references/api-reference.md to all remaining skills
- Update all 648 LICENSE files: copyright now reads 'Mahipal'
- Add implementing-security-monitoring-with-datadog (new skill with full anatomy)
- All 649 skills now have: SKILL.md, LICENSE, scripts/agent.py, references/api-reference.md

skills/configuring-multi-factor-authentication-with-duo/references/api-reference.md

@@ -0,0 +1,46 @@
+# Duo MFA Configuration — API Reference
+
+## Libraries
+
+| Library | Install | Purpose |
+|---------|---------|---------|
+| duo_client | `pip install duo_client` | Official Duo SDK for Python |
+| requests | `pip install requests` | HTTP client for Admin API |
+
+## Duo Admin API Endpoints
+
+| Method | Endpoint | Description |
+|--------|----------|-------------|
+| GET | `/admin/v1/users` | List all users with enrollment status |
+| GET | `/admin/v1/users/{user_id}` | Get user details and devices |
+| GET | `/admin/v1/info/summary` | Account summary (user count, integrations) |
+| GET | `/admin/v2/logs/authentication` | Authentication logs (v2 with paging) |
+| POST | `/admin/v1/users/enroll` | Enroll new user for MFA |
+| POST | `/admin/v1/users/{id}/bypass_codes` | Generate bypass codes |
+
+## Authentication (HMAC Signing)
+
+```python
+import duo_client
+admin_api = duo_client.Admin(
+    ikey="DIXXXXXXXXXXXXXXXXXX",
+    skey="YourSecretKey",
+    host="api-XXXXXXXX.duosecurity.com"
+)
+users = admin_api.get_users()
+```
+
+## User Status Values
+
+| Status | Description |
+|--------|-------------|
+| active | User enrolled and can authenticate |
+| bypass | MFA bypassed — security risk |
+| disabled | User account disabled |
+| locked_out | Temporarily locked due to failed attempts |
+
+## External References
+
+- [Duo Admin API Reference](https://duo.com/docs/adminapi)
+- [duo_client Python SDK](https://github.com/duosecurity/duo_client_python)
+- [Duo Auth API](https://duo.com/docs/authapi)