fix: Change email sender display name to "Norda Biznes Hub"

Previously showed "InPi Notifications" which was confusing.
Now emails will display as "Norda Biznes Hub <noreply@inpi.pl>"

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

email_service.py

@@ -131,6 +131,9 @@ class EmailService:
                 content = body_text
 
             # Build email message
+            # Display name for sender - shown in email clients
+            sender_display_name = "Norda Biznes Hub"
+
             email_msg = {
                 "message": {
                     "subject": subject,
@@ -141,7 +144,8 @@ class EmailService:
                     "toRecipients": recipients,
                     "from": {
                         "emailAddress": {
-                            "address": sender
+                            "address": sender,
+                            "name": sender_display_name
                         }
                     }
                 },