Enhance banking transaction data structure and validation

- Increased the length of the NameOfPayer field from NVARCHAR(60) to NVARCHAR(140) in the banking transactions function, table, temporary table, and user-defined type to accommodate longer names.
- Expanded the SepaRemittanceInformation field from VARCHAR(150) to VARCHAR(200) in the banking transactions function for more detailed remittance information.
- Modified the stored procedure fds__setBankingtransaction_done to return additional transaction data (ValueDate and Amount) along with the success flag for improved notification messaging.
- Added validation in MFRClientConfig constructor to ensure the provided URL is not null or empty, enhancing error handling for configuration settings.

Fuchs/wwwroot/web/fis.js

@@ -3088,8 +3088,22 @@ $fis.notifications = {
         this.connection.on('notification', (notification) => {
             this.push(notification);
         });
-        this.connection.start().catch(() => {
+        // withAutomaticReconnect() only retries a connection that was successfully
+        // established and later dropped — it does not retry a failed initial start()
+        // (e.g. the server restarting mid-debug). Without this, a single failed start()
+        // silently blackholes every notification for the rest of the page's lifetime.
+        this.connection.onclose(() => {
+            console.warn('Notification connection closed; retrying in 5s.');
             this.connection = null;
+            setTimeout(() => this.init(), 5000);
+        });
+        this.start();
+    },
+    start: function () {
+        this.connection.start().catch((err) => {
+            console.warn('Notification connection failed to start; retrying in 5s.', err);
+            this.connection = null;
+            setTimeout(() => this.init(), 5000);
         });
     },
     ensureFrame: function () {