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-network-access-control-with-cisco-ise/references/api-reference.md

@@ -0,0 +1,51 @@
+# API Reference: Implementing Network Access Control with Cisco ISE
+
+## Cisco ISE ERS API
+
+```python
+import requests
+resp = requests.get("https://ISE:9060/ers/config/authorizationprofile",
+                    auth=("admin", "password"),
+                    headers={"Accept": "application/json"}, verify=False)
+```
+
+## Key ERS Endpoints
+
+| Endpoint | Description |
+|----------|-------------|
+| `/ers/config/authorizationprofile` | Authorization profiles |
+| `/ers/config/networkdevice` | Network devices |
+| `/ers/config/endpointgroup` | Endpoint groups |
+| `/ers/config/identitygroup` | Identity groups |
+| `/ers/config/internaluser` | Internal users |
+
+## ISE Policy Components
+
+| Component | Description |
+|-----------|-------------|
+| Authentication Policy | Protocol selection (EAP-TLS, PEAP) |
+| Authorization Policy | Access decisions (permit, deny, quarantine) |
+| Profiling Policy | Endpoint classification |
+| Posture Policy | Compliance checks (AV, patch level) |
+
+## 802.1X Authentication Methods
+
+| Method | Security Level | Use Case |
+|--------|---------------|----------|
+| EAP-TLS | Highest | Certificate-based corporate |
+| PEAP-MSCHAPv2 | High | Username/password |
+| MAB | Low | Non-supplicant devices |
+
+## RADIUS Attributes
+
+| Attribute | Description |
+|-----------|-------------|
+| Calling-Station-Id | Client MAC address |
+| NAS-IP-Address | Switch/AP IP |
+| Tunnel-Type | VLAN assignment |
+| Filter-Id | ACL name |
+
+### References
+
+- Cisco ISE API: https://developer.cisco.com/docs/identity-services-engine/
+- ISE Admin Guide: https://www.cisco.com/c/en/us/td/docs/security/ise/