Fix SKILL.md frontmatter: add missing domain/subdomain/tags/version/author/license fields, fix name=None entries — all 649 skills now pass CI validation

skills/analyzing-network-flow-data-with-netflow/SKILL.md

@@ -5,6 +5,12 @@ description: >-
   exfiltration, and C2 beaconing patterns. Uses the Python netflow library to decode flow
   records, builds traffic baselines, and applies statistical analysis to identify flows
   with abnormal byte counts, connection durations, and periodic timing patterns.
+domain: cybersecurity
+subdomain: network-security
+tags: [analyzing, network, flow, data]
+version: "1.0"
+author: mahipal
+license: MIT
 ---
 
 ## Instructions