Add reproducible run manifest summarizer

tests/test_summarize_runs.py

@@ -0,0 +1,25 @@
+from summarize_runs import summarize_manifest
+
+
+def test_summarize_manifest_extracts_comparable_quality_signals():
+    manifest = {
+        "run_id": "abc",
+        "backend": "Depth Anything V2",
+        "runtime": "CPU",
+        "view_count": 2,
+        "claims": {"generated_novel_views": False},
+        "metrics": {
+            "fused_point_count": 12,
+            "projection_coverage": [0.5, 1.0],
+            "reprojection_consistency": [
+                {"mean_absolute_error": 0.1},
+                {"mean_absolute_error": 0.3},
+            ],
+            "fallback_error": None,
+        },
+    }
+    row = summarize_manifest(manifest, "run.json")
+    assert row["projection_coverage_mean"] == 0.75
+    assert row["reprojection_mae_mean"] == 0.2
+    assert row["fused_point_count"] == 12
+    assert row["claims"]["generated_novel_views"] is False