chore: update STATE.a2ml timestamp to 2026-03-29

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

.machine_readable/6a2/STATE.a2ml

@@ -4,7 +4,7 @@
 
 [metadata]
 version = "1.1.0"
-last-updated = "2026-03-20"
+last-updated = "2026-03-29"
 format-spec = "hyperpolymath/rsr-template-repo/spec/STATE-FORMAT-SPEC.adoc"
 
 [project-context]