test(issue-5): add layer-1 herdr and layer-2 watcher test fixtures

tests/fixtures/issue_5/watcher/finalized_candidate.json

@@ -0,0 +1,61 @@
+{
+  "schema_version": "1.0.0",
+  "scenario_id": "finalized_candidate",
+  "backend": "backend_agnostic",
+  "provenance": "simulated",
+  "description": "Execution anchor verified, native status idle/done, atomic rename complete with valid SHA-256 commit manifest. Inferred candidate approved for CAS.",
+  "dispatch_context": {
+    "job_id": "test-job-finalized-01",
+    "attempt_id": 1,
+    "agent_session_uuid": "7d5700d0-bab1-4f65-9665-6b887396a9a6",
+    "pane_process_generation": "w2X:p1:1234:2026-09-06T00:00:00Z",
+    "dispatch_ack": true,
+    "execution_anchor_observed": true
+  },
+  "timeline": [
+    {
+      "collector_clock_id": "CLOCK_MONOTONIC",
+      "relative_ms": 0,
+      "source_kind": "event",
+      "source_provenance": "simulated",
+      "payload": {
+        "event": "started",
+        "job_id": "test-job-finalized-01"
+      }
+    },
+    {
+      "collector_clock_id": "CLOCK_MONOTONIC",
+      "relative_ms": 5000,
+      "source_kind": "filesystem",
+      "source_provenance": "simulated",
+      "payload": {
+        "report_manifest": {
+          "report_hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+          "attempt_id": 1,
+          "finalized": true
+        }
+      }
+    },
+    {
+      "collector_clock_id": "CLOCK_MONOTONIC",
+      "relative_ms": 6000,
+      "source_kind": "herdr",
+      "source_provenance": "simulated",
+      "payload": {
+        "agent_status": "idle",
+        "interactive_ready": true
+      }
+    }
+  ],
+  "filesystem": {
+    "report_path": ".mam/jobs/test-job-finalized-01/report-final.md",
+    "exists": true,
+    "manifest_committed": true,
+    "hash_verified": true
+  },
+  "expected_policy": {
+    "decision": "candidate_approved",
+    "reason": "all 4-fold attribution, fresh idle status, and atomic finalization manifest verified",
+    "policy_version": "2.0.0"
+  }
+}