Dev backtest (#1134)

backtest/persistence_db.go

@@ -0,0 +1,16 @@
+package backtest
+
+import (
+	"database/sql"
+)
+
+var persistenceDB *sql.DB
+
+// UseDatabase enables database-backed persistence for all backtest storage operations.
+func UseDatabase(db *sql.DB) {
+	persistenceDB = db
+}
+
+func usingDB() bool {
+	return persistenceDB != nil
+}