refactor(descriptiles): complete migration — deletions + doc/content edits

The prior commit captured only the renamed descriptiles/ files (index desync
from a stash round-trip during verification). This adds the 6a2/ deletions and
the ~30 doc/metadata + TRUST.contractile + check-doc-truthing.sh edits so the
migration is whole.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

.claude/CLAUDE.md

@@ -29,12 +29,12 @@ https://github.com/hyperpolymath/nextgen-languages/blob/main/docs/disambiguation
 
 The following files in `.machine_readable/` contain structured project metadata:
 
-- `.machine_readable/6a2/STATE.a2ml` - Current project state and progress
-- `.machine_readable/6a2/META.a2ml` - Architecture decisions and development practices
-- `.machine_readable/6a2/ECOSYSTEM.a2ml` - Position in the ecosystem and related projects
-- `.machine_readable/6a2/AGENTIC.a2ml` - AI agent interaction patterns
-- `.machine_readable/6a2/NEUROSYM.a2ml` - Neurosymbolic integration config
-- `.machine_readable/6a2/PLAYBOOK.a2ml` - Operational runbook
+- `.machine_readable/descriptiles/STATE.a2ml` - Current project state and progress
+- `.machine_readable/descriptiles/META.a2ml` - Architecture decisions and development practices
+- `.machine_readable/descriptiles/ECOSYSTEM.a2ml` - Position in the ecosystem and related projects
+- `.machine_readable/descriptiles/AGENTIC.a2ml` - AI agent interaction patterns
+- `.machine_readable/descriptiles/NEUROSYM.a2ml` - Neurosymbolic integration config
+- `.machine_readable/descriptiles/PLAYBOOK.a2ml` - Operational runbook
 
 ---
 
@@ -57,7 +57,7 @@ The following files in `.machine_readable/` contain structured project metadata:
 | **Bash/POSIX Shell** | Scripts, automation | Keep minimal |
 | **Python** | SaltStack only | No other Python permitted |
 | **Nickel** | Configuration language | For complex configs |
-| **A2ML** | State/meta files | .machine_readable/6a2/STATE.a2ml, .machine_readable/6a2/META.a2ml, .machine_readable/6a2/ECOSYSTEM.a2ml |
+| **A2ML** | State/meta files | .machine_readable/descriptiles/STATE.a2ml, .machine_readable/descriptiles/META.a2ml, .machine_readable/descriptiles/ECOSYSTEM.a2ml |
 | **Julia** | Batch scripts, data processing | Per RSR |
 | **OCaml** | AffineScript compiler | Language-specific (compiler-host tooling lives here) |
 | **Ada** | Safety-critical systems | Where required |