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-dynamic-analysis-with-any-run/SKILL.md

@@ -1,16 +1,27 @@
 ---
 name: performing-dynamic-analysis-with-any-run
-description: >
-  Performs interactive dynamic malware analysis using the ANY.RUN cloud sandbox to observe
-  real-time execution behavior, interact with malware prompts, and capture process trees,
-  network traffic, and system changes. Activates for requests involving interactive sandbox
-  analysis, cloud-based malware detonation, real-time behavioral observation, or ANY.RUN usage.
+description: 'Performs interactive dynamic malware analysis using the ANY.RUN cloud sandbox to observe real-time execution
+  behavior, interact with malware prompts, and capture process trees, network traffic, and system changes. Activates for requests
+  involving interactive sandbox analysis, cloud-based malware detonation, real-time behavioral observation, or ANY.RUN usage.
+
+  '
 domain: cybersecurity
 subdomain: malware-analysis
-tags: [malware, dynamic-analysis, sandbox, ANY.RUN, interactive-analysis]
+tags:
+- malware
+- dynamic-analysis
+- sandbox
+- ANY.RUN
+- interactive-analysis
 version: 1.0.0
 author: mahipal
 license: Apache-2.0
+d3fend_techniques:
+- File Metadata Consistency Validation
+- Application Protocol Command Analysis
+- Identifier Analysis
+- Content Format Conversion
+- Message Analysis
 ---
 
 # Performing Dynamic Analysis with ANY.RUN