Address PR comments.

Signed-off-by: JCW <a1q123456@users.noreply.github.com>

Author: a1q123456

src/xrpld/app/rdb/backend/SQLiteDatabase.h

@@ -2,7 +2,11 @@
 
 #include <xrpl/rdb/RelationalDatabase.h>
 
+#include <map>
 #include <memory>
+#include <optional>
+#include <variant>
+#include <vector>
 
 namespace xrpl {
 
@@ -378,7 +382,7 @@ class SQLiteDatabase final : public RelationalDatabase
     SQLiteDatabase&
     operator=(SQLiteDatabase const&) = delete;
     SQLiteDatabase&
-    operator=(SQLiteDatabase&& rhs) = delete;
+    operator=(SQLiteDatabase&&) = delete;
 
     /**
      * @brief ledgerDbHasSpace Checks if the ledger database has available
@@ -400,7 +404,7 @@ class SQLiteDatabase final : public RelationalDatabase
 
 private:
     ServiceRegistry& registry_;
-    bool const useTxTables_;
+    bool useTxTables_;
     beast::Journal j_;
     std::unique_ptr<DatabaseCon> ledgerDb_, txdb_;
 

src/xrpld/app/rdb/backend/detail/SQLiteDatabase.cpp

@@ -500,12 +500,10 @@ SQLiteDatabase::getTransaction(
 }
 
 SQLiteDatabase::SQLiteDatabase(SQLiteDatabase&& rhs) noexcept
-    : registry_(rhs.registry_)
-    , useTxTables_(rhs.useTxTables_)
-    , j_(rhs.j_)
-    , ledgerDb_(std::move(rhs.ledgerDb_))
-    , txdb_(std::move(rhs.txdb_))
+    : registry_(rhs.registry_), useTxTables_(rhs.useTxTables_), j_(rhs.j_)
 {
+    std::exchange(ledgerDb_, std::move(rhs.ledgerDb_));
+    std::exchange(txdb_, std::move(rhs.txdb_));
 }
 
 bool