feat(storage): index exact content references

tests/test_artifact_health_api.py

@@ -6,6 +6,9 @@ from pathlib import Path
 from k1link.compute.e44_data_amplification_audit import (
     build_e44_data_amplification_audit,
 )
+from k1link.compute.e50_content_reference_index import (
+    build_e50_content_reference_index,
+)
 from k1link.web.artifact_health_api import ArtifactHealthService
 
 
@@ -23,14 +26,21 @@ def test_artifact_health_reports_live_inventory_and_exact_audit(tmp_path: Path)
     _write(second / "shared.bin", b"shared")
     _write(second / "only-b.bin", b"bb")
     e44_results = runtime / "compute-experiments" / "e44" / "results"
-    build_e44_data_amplification_audit(
+    e44 = build_e44_data_amplification_audit(
         artifact_roots={"e30": first, "e40": second},
         output_root=e44_results,
     )
+    e50_results = runtime / "compute-experiments" / "e50" / "results"
+    e50 = build_e50_content_reference_index(
+        e44_result_root=e44.result_root,
+        artifact_roots={"e30": first, "e40": second},
+        output_root=e50_results,
+    )
 
     service = ArtifactHealthService(
         lambda: runtime,
         lambda: e44_results,
+        e50_results_root_provider=lambda: e50_results,
         cache_seconds=0,
     )
     document = service.snapshot()
@@ -40,7 +50,13 @@ def test_artifact_health_reports_live_inventory_and_exact_audit(tmp_path: Path)
     assert document.inventory.logical_bytes > 0
     assert document.exact_audit.state == "exact-current"
     assert document.exact_audit.duplicate_bytes == len(b"shared")
-    assert document.content_references.state == "not-indexed"
+    assert document.content_references.state == "indexed"
+    assert document.content_references.result_id == e50.result_id
+    assert document.content_references.logical_reference_count == 4
+    assert document.content_references.canonical_content_count == 3
+    assert document.content_references.duplicate_reference_count == 1
+    assert document.content_references.exact_duplicate_bytes == len(b"shared")
+    assert document.content_references.physical_reclamation_applied is False
     assert document.content_references.storage_migration_authorized is False
 
 
@@ -81,3 +97,4 @@ def test_artifact_health_reports_unavailable_runtime(tmp_path: Path) -> None:
     assert document.overall_state == "unavailable"
     assert document.inventory.state == "unavailable"
     assert document.exact_audit.state == "unavailable"
+    assert document.content_references.state == "not-indexed"