Attach optional Railiance recording-time evidence

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a09cbb-87c6-7900-a145-4ce53ba9f1a6

src/warden/audit.py

@@ -4,6 +4,8 @@ Every ops-warden action appends a JSONL event. Secret values are rejected at wri
 """
 from __future__ import annotations
 
+from warden.clock_attribution import recording_time
+
 import json
 import os
 import re
@@ -85,6 +87,7 @@ def record_event(
         if value is None:
             continue
         event[key] = value
+    event.update(recording_time())
     _assert_metadata_safe(json.dumps(event, default=str))
     state_dir.mkdir(parents=True, exist_ok=True)
     path = _audit_path(state_dir)

src/warden/clock_attribution.py

@@ -0,0 +1,17 @@
+"""Optional recording-time evidence; original local timestamps remain intact."""
+import os
+
+def recording_time():
+    if not os.environ.get('WARDEN_CLOCK_TRUST_FILE'):
+        return {}
+    try:
+        from railiance_clock.attribution import from_environment
+        result = from_environment('WARDEN_CLOCK_TRUST_FILE')
+        # These are time observations, not raw credentials. Keep audit metadata
+        # within the existing detector's restrictions without weakening it.
+        if result.get('railiance_time', {}).get('status') == 'usable':
+            result['railiance_time'].pop('epoch', None)
+            result['railiance_time'].pop('sample_id', None)
+        return result
+    except (ImportError, OSError, ValueError):
+        return {'railiance_time': {'status': 'unavailable', 'kind': 'recording_time'}}

src/warden/proxy.py

@@ -22,6 +22,8 @@ This module shells out but never *interprets* secret bytes in the ``--fetch`` pa
 """
 from __future__ import annotations
 
+from warden.clock_attribution import recording_time
+
 import json
 import os
 import re
@@ -156,6 +158,7 @@ def write_audit(
         "policy_decision_id": decision_id,
         "exit_code": exit_code,
     }
+    record.update(recording_time())
     with log_path.open("a") as f:
         f.write(json.dumps(record) + "\n")
     try: