fix(a2ml): add identity name field to 3 governance manifests

The "Validate A2ML manifests" job failed with 3 errors, all
"Missing required identity field (agent-id, name, or project)":
- docs/governance/CRG-CRITERIA.a2ml
- docs/governance/MAINTENANCE-CHECKLIST.a2ml
- docs/governance/TSDM.a2ml

These files carry identity only in formats the validator does not treat
as an identity key (S-expr `(name ...)`, nested YAML `name:`, or no key
at all). Add a top-level `name = "..."` line matching the canonical
estate-standardization form already applied to the same files across
sibling repos (developer-ecosystem iser-tools), placed:
- CRG-CRITERIA.a2ml: between the SPDX and Copyright `;` header lines.
- MAINTENANCE-CHECKLIST.a2ml: as the first key inside [metadata].
- TSDM.a2ml: after the SPDX line, before the `---` document marker.

Specification content unchanged.

https://claude.ai/code/session_013wg3Mtq2QFhYi4XVw1Z6z7

Author: claude

docs/governance/CRG-CRITERIA.a2ml

@@ -1,4 +1,5 @@
 ; SPDX-License-Identifier: MPL-2.0
+name = "CRG-CRITERIA"
 ; Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
 
 ; Component Readiness Grades (CRG) — Machine-readable specification

docs/governance/MAINTENANCE-CHECKLIST.a2ml

@@ -2,6 +2,7 @@
 # Cross-repo maintenance baseline (machine-readable canonical)
 
 [metadata]
+name = "MAINTENANCE-CHECKLIST"
 version = "1.1.0"
 last-updated = "2026-02-24"
 scope = "cross-repo"

docs/governance/TSDM.a2ml

@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: MPL-2.0
+name = "TSDM"
 ---
 ### [TSDM_SPEC]
 id: "tsdm-standard"