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/implementing-mimecast-targeted-attack-protection/references/api-reference.md

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+# API Reference: Implementing Mimecast Targeted Attack Protection
+
+## Mimecast API Authentication
+
+```python
+import requests
+headers = {"Authorization": "MC access_key:secret_key",
+           "x-mc-app-id": "app-id"}
+resp = requests.post("https://us-api.mimecast.com/api/ttp/url/get-logs",
+                     headers=headers, json={"data": [{"from": "2024-01-01"}]})
+```
+
+## TTP API Endpoints
+
+| Endpoint | Description |
+|----------|-------------|
+| `/api/ttp/url/get-logs` | URL Protection logs |
+| `/api/ttp/attachment/get-logs` | Attachment sandbox logs |
+| `/api/ttp/impersonation/get-logs` | Impersonation detections |
+
+## URL Protection Actions
+
+| Action | Description |
+|--------|-------------|
+| allow | URL permitted |
+| block | URL blocked (malicious) |
+| warn | User warned before click |
+| sandbox | Deferred for sandbox analysis |
+
+## Attachment Sandbox Results
+
+| Result | Severity |
+|--------|----------|
+| safe | INFO |
+| suspicious | MEDIUM |
+| malicious | CRITICAL |
+| sandbox_timeout | HIGH |
+
+## Impersonation Types
+
+| Type | Description |
+|------|-------------|
+| Internal | Employee name spoofing |
+| External | Vendor/partner spoofing |
+| Domain | Similar domain detection |
+
+### References
+
+- Mimecast API: https://developer.services.mimecast.com/
+- TTP URL Protection: https://developer.services.mimecast.com/docs/threatsintel/1/routes/ttp/url/get-logs/post