Introduce identity model and reconcile upstream imports

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a070b5-4994-7271-bd8b-7c3dbcedec4b

infospace/indexes/import-matrix.yaml

@@ -38,6 +38,7 @@ artifacts:
 - model/devsecops
 - model/evidence
 - model/governance
+- model/identity
 - model/information-space
 - model/landscape
 - model/network
@@ -385,6 +386,8 @@ rows:
     - maps
     model/governance:
     - maps
+    model/identity:
+    - maps
     model/information-space:
     - maps
     model/landscape:
@@ -429,6 +432,8 @@ rows:
     - uses
     model/governance:
     - uses
+    model/identity:
+    - uses
     model/organization:
     - uses
 - artifact: model/capability
@@ -483,12 +488,24 @@ rows:
     - conforms_to
     model/evidence:
     - uses
+- artifact: model/identity
+  targets:
+    kernel/itc-core:
+    - conforms_to
+    model/access-control:
+    - uses
+    model/evidence:
+    - uses
+    model/organization:
+    - uses
 - artifact: model/information-space
   targets:
     kernel/itc-core:
     - conforms_to
     model/evidence:
     - uses
+    model/identity:
+    - uses
 - artifact: model/landscape
   targets:
     kernel/itc-core:
@@ -517,6 +534,8 @@ rows:
     - conforms_to
     model/evidence:
     - uses
+    model/identity:
+    - uses
 - artifact: model/purpose-demand-extension
   targets:
     concept-catalog/purpose-demand: