Address code review feedback: Fix namespace boundary definition, update GATE-006 status to active, improve governance pattern matching

Co-authored-by: AmedeoPelliccia <164860269+AmedeoPelliccia@users.noreply.github.com>

Author: Copilot

.github/workflows/governance-gates.yml

@@ -96,7 +96,7 @@ jobs:
           GOVERNANCE_CHANGE=false
           
           # Pattern 1: Standards (STD files in ATA 00)
-          if echo "$CHANGED_FILES" | grep -E "00_00_STD_LC01.*\.md$"; then
+          if echo "$CHANGED_FILES" | grep -E "00_00_STD_.*\.md$"; then
             echo "✓ Governance standard change detected"
             GOVERNANCE_CHANGE=true
           fi

00_00_IDX_LC01_SPACET_ci-governance-gates_v01.md

@@ -35,7 +35,7 @@ This index catalogs all **CI/CD governance gates** implemented to enforce nomenc
 
 | Gate ID | Gate Name | Script/Tool | Enforcement Level | Status | Notes |
 | :--- | :--- | :--- | :--- | :--- | :--- |
-| **GATE-006** | Governance Change Detection | `scripts/detect_governance_changes.py` | LABELING | Planned | Auto-labels PRs requiring CM review |
+| **GATE-006** | Governance Change Detection | Built into governance-gates.yml | LABELING | Active | Auto-labels PRs requiring CM review |
 | **GATE-007** | Breaking Schema Change Detection | `scripts/detect_schema_breaking_changes.py` | BLOCKING | Planned | Requires migration plan for breaking changes |
 | **GATE-008** | Evidence Link Validation | `scripts/validate_evidence_links.py` | WARNING | Planned | Checks evidence pack integrity |
 | **GATE-009** | TYPE Code Detection | `scripts/detect_new_types.py` | WARNING | Active | Alerts on unapproved TYPE codes |
@@ -71,8 +71,8 @@ This index catalogs all **CI/CD governance gates** implemented to enforce nomenc
 
 ### By Status
 
-- **Active (implemented):** GATE-001, GATE-009, GATE-010
-- **Planned (to be implemented):** GATE-002, GATE-003, GATE-004, GATE-005, GATE-006, GATE-007, GATE-008, GATE-011, GATE-012, GATE-013, GATE-014, GATE-015, GATE-016, GATE-017, GATE-018
+- **Active (implemented):** GATE-001, GATE-006, GATE-009, GATE-010
+- **Planned (to be implemented):** GATE-002, GATE-003, GATE-004, GATE-005, GATE-007, GATE-008, GATE-011, GATE-012, GATE-013, GATE-014, GATE-015, GATE-016, GATE-017, GATE-018
 
 ### By Responsible Team
 
@@ -406,9 +406,9 @@ jobs:
 
 ### Implementation Priority
 
-**Phase 1 (Immediate):** GATE-001, GATE-009, GATE-010 (active)
+**Phase 1 (Immediate - Complete):** GATE-001, GATE-006, GATE-009, GATE-010 (active)
 
-**Phase 2 (Q1 2026):** GATE-002, GATE-003, GATE-004, GATE-005, GATE-006 (critical for governance enforcement)
+**Phase 2 (Q1 2026):** GATE-002, GATE-003, GATE-004, GATE-005 (critical for governance enforcement)
 
 **Phase 3 (Q2 2026):** GATE-007, GATE-008, GATE-015, GATE-016, GATE-017 (audit and staleness detection)
 

00_00_STD_LC01_SPACET_identifier-grammar_v01.md

@@ -50,7 +50,7 @@ This standard applies to:
 
 - **Canonical Identifier**: A globally unique, immutable identifier conforming to this grammar.
 - **Namespace**: A logical grouping prefix preventing collisions (e.g., `ATA24`, `REQ`, `HAZ`).
-- **Namespace Boundary**: The scope within which an identifier authority has jurisdiction.
+- **Namespace Boundary**: The organizational or technical limit of an identifier authority's jurisdiction, defining the scope within which an identifier authority has exclusive control over ID assignment.
 - **Identifier Authority**: The ATA, system, or team responsible for issuing IDs within a namespace.
 - **Shadow Registry**: An unauthorized or uncoordinated identifier registry (forbidden).
 - **Deduplication Enforcement**: ATA 99 mechanism preventing duplicate IDs across namespaces.

00_00_STD_LC01_SPACET_ssot-decision-matrix_v01.md

@@ -110,7 +110,7 @@ The matrix categorizes all artifact types using these attributes:
 | :--- | :--- | :--- | :--- | :--- |
 | **Test Results** | Hybrid | Authoritative for execution; derived for pass/fail analysis | Test Team | Results are authoritative; summaries are derived |
 | **Code + Documentation** | Hybrid | Code is authoritative; auto-docs are derived | Dev Team | Code SSOT; docs regenerated |
-| **Schema + Instances** | Hybrid | Schema is authoritative; instance validation is derived | Data Team | Schema SSOT; validation reports derived |
+| **Schema + Instances** | Hybrid | Schema is authoritative; instance validation is derived | ATA 91 (Schema Registry) | Schema SSOT; validation reports derived |
 
 ### 4.5 Forbidden Patterns