refactor: improve panel sync performance

backend/db/dal/user_dal.py

@@ -404,6 +404,10 @@ async def merge_users(
         target.lifetime_used_traffic_bytes = (
             target.lifetime_used_traffic_bytes or 0
         ) + source.lifetime_used_traffic_bytes
+        source_synced_at = getattr(source, "lifetime_used_traffic_synced_at", None)
+        target_synced_at = getattr(target, "lifetime_used_traffic_synced_at", None)
+        if source_synced_at and (not target_synced_at or source_synced_at > target_synced_at):
+            target.lifetime_used_traffic_synced_at = source_synced_at
     if not target.referred_by_id and source.referred_by_id != target_user_id:
         target.referred_by_id = source.referred_by_id
     if target.referred_by_id == source_user_id:

backend/db/migrator.py

@@ -873,6 +873,15 @@ def _migration_0025_add_support_notification_timestamps(connection: Connection)
             )
 
 
+def _migration_0026_add_lifetime_traffic_synced_at(connection: Connection) -> None:
+    inspector = inspect(connection)
+    columns: Set[str] = {col["name"] for col in inspector.get_columns("users")}
+    if "lifetime_used_traffic_synced_at" not in columns:
+        connection.execute(
+            text("ALTER TABLE users ADD COLUMN lifetime_used_traffic_synced_at TIMESTAMPTZ")
+        )
+
+
 MIGRATIONS: List[Migration] = [
     Migration(
         id="0001_add_channel_subscription_fields",
@@ -1010,6 +1019,11 @@ MIGRATIONS: List[Migration] = [
         description="Track support ticket admin notification cooldown timestamps",
         upgrade=_migration_0025_add_support_notification_timestamps,
     ),
+    Migration(
+        id="0026_add_lifetime_traffic_synced_at",
+        description="Track when lifetime traffic usage was last synced from panel",
+        upgrade=_migration_0026_add_lifetime_traffic_synced_at,
+    ),
 ]
 
 

backend/db/models.py

@@ -42,6 +42,7 @@ class User(Base):
     referral_code = Column(String(16), nullable=True, unique=True, index=True)
     referred_by_id = Column(BigInteger, ForeignKey("users.user_id"), nullable=True)
     lifetime_used_traffic_bytes = Column(BigInteger, nullable=True)
+    lifetime_used_traffic_synced_at = Column(DateTime(timezone=True), nullable=True)
     channel_subscription_verified = Column(Boolean, nullable=True)
     channel_subscription_checked_at = Column(DateTime(timezone=True), nullable=True)
     channel_subscription_verified_for = Column(BigInteger, nullable=True)