fix: change push.register return type to tuple and only send welcome notification on new registration

devplacepy/push.py

@@ -250,7 +250,7 @@ async def notify_user(user_uid: str, payload: dict[str, Any]) -> None:
 
 async def register(
     user_uid: str, endpoint: str, key_auth: str, key_p256dh: str
-) -> dict[str, Any]:
+) -> tuple[dict[str, Any], bool]:
     table = get_table("push_registration")
     existing = table.find_one(
         user_uid=user_uid,
@@ -261,7 +261,7 @@ async def register(
     )
     if existing:
         logger.debug("Push subscription already registered for user %s", user_uid)
-        return existing
+        return existing, False
 
     record = {
         "uid": generate_uid(),
@@ -274,4 +274,4 @@ async def register(
     }
     table.insert(record)
     logger.info("Registered push subscription for user %s", user_uid)
-    return record
+    return record, True