fix: close broker uncertainty audit gaps

trex_core/adapters/persistence/sql/017_add_slot_order_venue.sql

@@ -8,4 +8,6 @@ ALTER TABLE daily_slot
 
 ALTER TABLE daily_slot
     ADD CONSTRAINT daily_slot_venue_check
-    CHECK (venue IN ('KRX', 'NXT', 'SOR'));
+    -- apply_migrations() replays every file on each boot. Keep this historical
+    -- migration compatible with AUTO rows introduced by migration 019.
+    CHECK (venue IN ('AUTO', 'KRX', 'NXT', 'SOR'));

trex_core/adapters/persistence/sql/021_create_broker_account_snapshot.sql

@@ -1,5 +1,5 @@
 -- dcy-041 / GitHub #45: account-scoped last healthy KIS snapshot.
--- account_hash is SHA-256(CANO|ACNT_PRDT_CD); no plaintext account identity,
+-- account_hash is SHA-256(base_url|CANO|ACNT_PRDT_CD|app_key); no plaintext identity,
 -- token, key, order response, or broker payload is persisted.
 CREATE TABLE IF NOT EXISTS broker_account_snapshot (
     account_hash    TEXT PRIMARY KEY,