Fix Review 64 valuation authority regressions

tests/test_valuation_contract_docs.py

@@ -43,6 +43,25 @@ def test_interface_contract_documents_public_valuation_enums_validation_and_mapp
         assert marker in interface, marker
 
 
+def test_data_model_documents_valuation_selection_contract_and_index_mapping() -> None:
+    data_model = _text("docs/data-model.md")
+
+    required_contract = (
+        "select_account_valuation",
+        "account_id is mandatory",
+        "currency and valuation_kind/purpose are optional filters",
+        "basis_date exact match or <= upper bound",
+        "verified leaf valuations only",
+        "future-dated and unverified valuations are excluded",
+        "idx_account_valuations_account_date supports account/date selection",
+        "idx_account_valuations_status_date supports status/date selection",
+        "neither index covers account + currency + purpose",
+        "idempotency and single_correction indexes enforce write integrity, not selection",
+    )
+    for marker in required_contract:
+        assert marker in data_model, marker
+
+
 def test_loan_cache_writers_document_no_inferred_valuation_history() -> None:
     data_model = _text("docs/data-model.md")
     interface = _text("docs/interface-contract.md")