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-secrets-management-with-vault/references/api-reference.md

@@ -0,0 +1,27 @@
+# API Reference: HashiCorp Vault secrets management audit
+
+## API Details
+hvac.Client(url, token): read_secret(), write_secret(), sys.list_auth_methods(), seal_status
+
+## Installation
+```bash
+pip install hvac
+```
+
+## Libraries
+
+| Library | Use |
+|---------|-----|
+| `hvac` | hvac client/SDK |
+
+## Authentication
+
+| Method | Header |
+|--------|--------|
+| Bearer Token | `Authorization: Bearer <token>` |
+| API Key | `X-API-Key: <key>` |
+
+## Output Format
+```json
+{"timestamp": "ISO-8601", "findings": [], "risk_level": "HIGH"}
+```