fix: repair chained imports and track blocked evidence dependencies

Assistant: codex
Assistant-Model: gpt-6.1-sol
Assistant-Session: 01a1046e-465c-7d43-8c4c-d10f0a1feadd

audit_core/integrity.py

@@ -64,6 +64,29 @@ class ChainReport:
         }
 
 
+def order_chain_rows(rows: Iterable[ChainRow]) -> list[ChainRow]:
+    """Follow stored links, independently of historical acceptance timestamps.
+
+    Keep unreachable/forked rows in the result so verify_rows reports a break
+    rather than silently dropping evidence outside the genesis chain.
+    """
+    remaining = list(rows)
+    successors: dict[str, list[ChainRow]] = {}
+    for row in remaining:
+        successors.setdefault(row.chain_prev, []).append(row)
+    ordered: list[ChainRow] = []
+    used: set[str] = set()
+    previous = GENESIS
+    while len(successors.get(previous, [])) == 1:
+        row = successors[previous][0]
+        if row.event_id in used:
+            break
+        ordered.append(row)
+        used.add(row.event_id)
+        previous = row.chain_hash
+    return ordered + [row for row in remaining if row.event_id not in used]
+
+
 def verify_rows(
     rows: Iterable[ChainRow],
     *,