feat: add NIST CSF 2.0 nist_csf field to all 754 cybersecurity skills

Mapped every skill to NIST CSF 2.0 subcategory IDs (GV/ID/PR/DE/RS/RC functions)
based on subdomain and content analysis. Restores 11 skills corrupted during
prior rebase, re-enriching with ATLAS, D3FEND, NIST AI RMF, and CSF 2.0 fields.

All 754 skills now carry structured mappings for all 5 security frameworks:
- MITRE ATT&CK (in tags)
- MITRE ATLAS v5.5 (atlas_techniques)
- MITRE D3FEND v1.3 (d3fend_techniques)
- NIST AI RMF 1.0 (nist_ai_rmf)
- NIST CSF 2.0 (nist_csf)

skills/analyzing-api-gateway-access-logs/SKILL.md

@@ -1,16 +1,25 @@
 ---
 name: analyzing-api-gateway-access-logs
-description: >
-  Parses API Gateway access logs (AWS API Gateway, Kong, Nginx) to detect BOLA/IDOR
-  attacks, rate limit bypass, credential scanning, and injection attempts. Uses pandas
-  for statistical analysis of request patterns and anomaly detection. Use when
-  investigating API abuse or building API-specific threat detection rules.
+description: 'Parses API Gateway access logs (AWS API Gateway, Kong, Nginx) to detect BOLA/IDOR attacks, rate limit bypass,
+  credential scanning, and injection attempts. Uses pandas for statistical analysis of request patterns and anomaly detection.
+  Use when investigating API abuse or building API-specific threat detection rules.
+
+  '
 domain: cybersecurity
 subdomain: security-operations
-tags: [analyzing, api, gateway, access]
-version: "1.0"
+tags:
+- analyzing
+- api
+- gateway
+- access
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- DE.CM-01
+- RS.MA-01
+- GV.OV-01
+- DE.AE-02
 ---
 
 # Analyzing API Gateway Access Logs