Introduce shared evidence model and governance imports

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

tests/test_evidence_boundary.py

@@ -0,0 +1,28 @@
+import re
+
+from info_tech_canon.generation import concept_ownership
+from info_tech_canon.service import load_context
+
+
+def test_shared_evidence_has_one_retrievable_owner():
+    context = load_context()
+    concepts = concept_ownership(context)["concepts"]
+    for name in ["Evidence", "Evidence Source", "Adjudication Outcome", "Evidence strength"]:
+        assert {item["owner"] for item in concepts if item["concept"] == name} == {"model/evidence"}
+    artifacts = {item.id: item for item in context.infospace.artifacts}
+    assert "model/evidence" in artifacts
+    assert "model/evidence" in (context.infospace_root / "artifacts/index.yaml").read_text()
+
+
+def test_live_governance_ownership_lists_do_not_reclaim_evidence():
+    root = load_context().infospace_root
+    for path in [*(root / "models").rglob("*.md"), *(root / "standards").rglob("*.md")]:
+        text = path.read_text()
+        for clause in re.findall(r"Governance owns([^.\n]*)", text, re.I):
+            owned_clause = re.split(r"\band imports\b", clause, flags=re.I)[0]
+            assert not re.search(r"\bevidence\b", owned_clause, re.I), str(path)
+        for block in re.findall(r"(?:The )?Governance Model owns[^\n]*:\n\n```[^\n]*\n(.*?)```", text, re.S):
+            assert "Evidence" not in block.splitlines(), str(path)
+    gov = (root / "models/governance/InfoTechCanonGovernanceModel.md").read_text()
+    assert "**Evidence** is" not in gov
+    assert "itc-evid:Evidence (assertion drawn_from itc-evid:Evidence Source)" in gov