tests fixes and sprints work

etc/weights/v2026-01-22.weights.json

@@ -0,0 +1,50 @@
+{
+  "version": "v2026-01-22",
+  "effective_from": "2026-01-22T00:00:00Z",
+  "description": "EWS default weights - extracted from EvidenceWeights.Default",
+  "weights": {
+    "rch": 0.30,
+    "rts": 0.25,
+    "bkp": 0.15,
+    "xpl": 0.15,
+    "src": 0.10,
+    "mit": 0.10
+  },
+  "dimension_names": {
+    "rch": "Reachability",
+    "rts": "Runtime Signal",
+    "bkp": "Backport Evidence",
+    "xpl": "Exploit Likelihood",
+    "src": "Source Trust",
+    "mit": "Mitigation Effectiveness"
+  },
+  "subtractive_dimensions": ["mit"],
+  "guardrails": {
+    "speculative_cap": 45,
+    "not_affected_cap": 15,
+    "runtime_floor": 60
+  },
+  "buckets": {
+    "act_now_min": 90,
+    "schedule_next_min": 70,
+    "investigate_min": 40
+  },
+  "determinization_thresholds": {
+    "manual_review_entropy": 0.60,
+    "refresh_entropy": 0.40
+  },
+  "signal_weights_for_entropy": {
+    "vex": 0.25,
+    "reachability": 0.25,
+    "epss": 0.15,
+    "runtime": 0.15,
+    "backport": 0.10,
+    "sbom_lineage": 0.10
+  },
+  "notes": [
+    "RCH and RTS carry highest weights as they provide strongest risk signal",
+    "MIT is the only subtractive dimension (mitigations reduce risk)",
+    "Guardrails are applied after weighted sum calculation",
+    "Entropy thresholds align with Determinization config"
+  ]
+}