Introduce shared evidence model and governance imports

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

infospace/indexes/import-matrix.yaml

@@ -36,6 +36,7 @@ artifacts:
 - model/capability
 - model/data
 - model/devsecops
+- model/evidence
 - model/governance
 - model/information-space
 - model/landscape
@@ -380,6 +381,8 @@ rows:
     - maps
     model/devsecops:
     - maps
+    model/evidence:
+    - maps
     model/governance:
     - maps
     model/information-space:
@@ -422,6 +425,8 @@ rows:
   targets:
     kernel/itc-core:
     - conforms_to
+    model/evidence:
+    - uses
     model/governance:
     - uses
     model/organization:
@@ -438,6 +443,8 @@ rows:
     - conforms_to
     mapping/capability-anchors:
     - introduces
+    model/evidence:
+    - uses
     model/governance:
     - uses
     model/landscape:
@@ -452,44 +459,64 @@ rows:
     - introduces
     kernel/itc-core:
     - conforms_to
+    model/evidence:
+    - uses
     model/governance:
     - uses
 - artifact: model/devsecops
   targets:
     kernel/itc-core:
     - conforms_to
+    model/evidence:
+    - uses
     model/security:
     - uses
+- artifact: model/evidence
+  targets:
+    kernel/itc-core:
+    - conforms_to
 - artifact: model/governance
   targets:
     catalog/evidence-basis:
     - introduces
     kernel/itc-core:
     - conforms_to
+    model/evidence:
+    - uses
 - artifact: model/information-space
   targets:
     kernel/itc-core:
     - conforms_to
+    model/evidence:
+    - uses
 - artifact: model/landscape
   targets:
     kernel/itc-core:
     - conforms_to
+    model/evidence:
+    - uses
 - artifact: model/network
   targets:
     kernel/itc-core:
     - conforms_to
+    model/evidence:
+    - uses
     model/security:
     - uses
 - artifact: model/observability
   targets:
     kernel/itc-core:
     - conforms_to
+    model/evidence:
+    - uses
     model/task:
     - uses
 - artifact: model/organization
   targets:
     kernel/itc-core:
     - conforms_to
+    model/evidence:
+    - uses
 - artifact: model/purpose-demand-extension
   targets:
     concept-catalog/purpose-demand:
@@ -508,10 +535,14 @@ rows:
     - conforms_to
     model/access-control:
     - uses
+    model/evidence:
+    - uses
 - artifact: model/task
   targets:
     kernel/itc-core:
     - conforms_to
+    model/evidence:
+    - uses
 - artifact: pattern/intent-scope-purposes
   targets:
     model/governance:
@@ -816,6 +847,8 @@ rows:
     - imports
     model/devsecops:
     - imports
+    model/evidence:
+    - uses
     model/governance:
     - imports
     model/network:
@@ -856,5 +889,7 @@ rows:
   targets:
     kernel/itc-core:
     - conforms_to
+    model/evidence:
+    - uses
     model/task:
     - imports