fix: allow guarded production Flow v2 shadow rebuild

scripts/simulate_blif_flow_v2.py

@@ -530,6 +530,8 @@ def collect(
     *, expected_database: str = "clientflow_codex_shadow",
     expected_user: str | None = "clientflow_codex",
     require_read_only: bool = True,
+    expected_opportunity_count: int | None = None,
+    require_opportunities: bool = False,
 ) -> dict[str, Any]:
     data = _load(
         expected_database=expected_database,
@@ -537,8 +539,12 @@ def collect(
         require_read_only=require_read_only,
     )
     opportunities = data["opportunities"]
-    if len(opportunities) != 328:
-        raise RuntimeError(f"expected 328 opportunities, found {len(opportunities)}")
+    if expected_opportunity_count is not None and len(opportunities) != expected_opportunity_count:
+        raise RuntimeError(
+            f"expected {expected_opportunity_count} opportunities, found {len(opportunities)}"
+        )
+    if require_opportunities and not opportunities:
+        raise RuntimeError("Flow v2 projection requires at least one opportunity")
     ids = [_s(opp["id"]) for opp in opportunities]
     v1_decisions = get_opportunity_next_actions(ids)
     operations = get_operations_summary(limit=200)