feat: enrich 209 skills with MITRE ATLAS, D3FEND, and NIST AI RMF frontmatter

Added structured security framework mappings to SKILL.md frontmatter across all applicable skills:
- atlas_techniques: MITRE ATLAS v5.5 AML.TXXXX IDs (81 skills, AI-targeted attack techniques)
- d3fend_techniques: MITRE D3FEND v1.3 defensive technique labels (139 skills, mapped from ATT&CK IDs)
- nist_ai_rmf: NIST AI RMF 1.0 subcategory IDs (85 skills, AI risk management functions)

Also updates ATTACK_COVERAGE.md with coverage statistics for all three frameworks.

skills/performing-hardware-security-module-integration/SKILL.md

@@ -1,12 +1,28 @@
 ---
 name: performing-hardware-security-module-integration
-description: Integrate Hardware Security Modules (HSMs) using PKCS#11 interface for cryptographic key management, signing operations, and secure key storage with python-pkcs11, AWS CloudHSM, and YubiHSM2.
+description: Integrate Hardware Security Modules (HSMs) using PKCS#11 interface for cryptographic key management, signing
+  operations, and secure key storage with python-pkcs11, AWS CloudHSM, and YubiHSM2.
 domain: cybersecurity
 subdomain: cryptography
-tags: [HSM, PKCS11, CloudHSM, YubiHSM2, key-management, cryptographic-operations, hardware-security]
-version: "1.0"
+tags:
+- HSM
+- PKCS11
+- CloudHSM
+- YubiHSM2
+- key-management
+- cryptographic-operations
+- hardware-security
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_ai_rmf:
+- MEASURE-2.7
+- MAP-5.1
+- MANAGE-2.4
+atlas_techniques:
+- AML.T0070
+- AML.T0066
+- AML.T0082
 ---
 
 # Performing Hardware Security Module Integration