wallet, interfaces: Include database format in listWalletDir

src/interfaces/wallet.h

@@ -343,7 +343,7 @@ public:
     virtual util::Result<WalletMigrationResult> migrateWallet(const std::string& name, const SecureString& passphrase) = 0;
 
     //! Return available wallets in wallet directory.
-    virtual std::vector<std::string> listWalletDir() = 0;
+    virtual std::vector<std::pair<std::string, std::string>> listWalletDir() = 0;
 
     //! Return interfaces for accessing wallets (if any).
     virtual std::vector<std::unique_ptr<Wallet>> getWallets() = 0;