feat: bootstrap accountability-root fabric snapshot

railiance_fabric/financial_baseline.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import json
+from datetime import datetime, timezone
 from pathlib import Path
 from typing import Any
 
@@ -67,8 +68,7 @@ def financial_export_from_legacy(
         ],
         "unresolved": [],
     }
-    if legacy_graph.get("generated_at"):
-        graph["generated_at"] = legacy_graph["generated_at"]
+    graph["generated_at"] = legacy_graph.get("generated_at") or _utc_now()
     materialized = materialize_financial_graph_export(graph)
     errors = financial_graph_errors(materialized)
     if errors:
@@ -135,3 +135,7 @@ def _has_value(value: Any) -> bool:
     if isinstance(value, list):
         return any(_has_value(item) for item in value)
     return value not in (None, "")
+
+
+def _utc_now() -> str:
+    return datetime.now(timezone.utc).replace(microsecond=0).isoformat().replace("+00:00", "Z")