Map all 754 skills to MITRE ATT&CK v19.1

- Add validated mitre_attack frontmatter to all 754 skills (286 distinct
  techniques), verified against MITRE ATT&CK v19.1 via the official
  mitreattack-python library: 0 revoked, deprecated, or invalid IDs
- Curate precise per-skill technique IDs for forensics, malware-analysis,
  threat-intel, and red-team skills (e.g. DCSync -> T1003.006,
  Kerberoasting -> T1558.003, Pass-the-Ticket -> T1550.003)
- Reconcile v19.1 tactic restructuring: Defense Evasion split into
  Stealth (TA0005) and Defense Impairment (TA0112); revoked T1562.*
  family and T1070.001/.002 remapped to active equivalents (T1685.*)
- Normalize word-split tags across 35 skills (remove filename-derived
  stopword tags, add semantic cybersecurity tags)
- Add api-reference.md for 3 skills that were missing it
- Update README ATT&CK section with accurate v19.1 tactic distribution

skills/performing-cloud-native-forensics-with-falco/SKILL.md

@@ -1,17 +1,21 @@
 ---
 name: performing-cloud-native-forensics-with-falco
-description: 'Uses Falco YAML rules for runtime threat detection in containers and Kubernetes, monitoring syscalls for shell
-  spawns, file tampering, network anomalies, and privilege escalation. Manages Falco rules via the Falco gRPC API and parses
-  Falco alert output. Use when building container runtime security or investigating k8s cluster compromises.
+description: 'Uses Falco YAML rules for runtime threat detection in containers and
+  Kubernetes, monitoring syscalls for shell spawns, file tampering, network anomalies,
+  and privilege escalation. Manages Falco rules via the Falco gRPC API and parses
+  Falco alert output. Use when building container runtime security or investigating
+  k8s cluster compromises.
 
   '
 domain: cybersecurity
 subdomain: cloud-security
 tags:
-- performing
-- cloud
-- native
-- forensics
+- cloud-security
+- falco
+- runtime-threat-detection
+- container-forensics
+- kubernetes-security
+- syscall-monitoring
 version: '1.0'
 author: mahipal
 license: Apache-2.0
@@ -20,6 +24,12 @@ nist_csf:
 - ID.AM-08
 - GV.SC-06
 - DE.CM-01
+mitre_attack:
+- T1078.004
+- T1530
+- T1537
+- T1580
+- T1068
 ---
 
 # Performing Cloud Native Forensics with Falco