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-kubernetes-network-policy-with-calico/references/api-reference.md

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+# API Reference: Implementing Kubernetes Network Policy with Calico
+
+## Kubernetes NetworkPolicy
+
+```yaml
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: default-deny-all
+  namespace: production
+spec:
+  podSelector: {}
+  policyTypes: [Ingress, Egress]
+```
+
+## Calico GlobalNetworkPolicy
+
+```yaml
+apiVersion: projectcalico.org/v3
+kind: GlobalNetworkPolicy
+metadata:
+  name: deny-external
+spec:
+  order: 100
+  selector: app == "backend"
+  types: [Ingress]
+  ingress:
+    - action: Deny
+      source:
+        nets: ["0.0.0.0/0"]
+```
+
+## calicoctl CLI
+
+```bash
+# Apply policy
+calicoctl apply -f policy.yaml
+# Get policies
+calicoctl get globalnetworkpolicy -o yaml
+# Get host endpoints
+calicoctl get hostendpoint
+```
+
+## Policy Types
+
+| Type | Scope | Ordering |
+|------|-------|----------|
+| NetworkPolicy | Namespace | Additive (OR) |
+| GlobalNetworkPolicy | Cluster-wide | Ordered by `order` field |
+
+## Common Policy Patterns
+
+| Pattern | Description |
+|---------|-------------|
+| Default deny | Empty podSelector, no rules |
+| Allow DNS | Egress to kube-system UDP/TCP 53 |
+| Allow ingress from namespace | namespaceSelector match |
+| Allow to external CIDR | ipBlock in egress |
+
+### References
+
+- Calico Docs: https://docs.tigera.io/calico/
+- K8s NetworkPolicy: https://kubernetes.io/docs/concepts/services-networking/network-policies/
+- Calico Policy Tutorial: https://docs.tigera.io/calico/latest/network-policy/