refactor: improve panel sync performance

tests/test_admin_sync_performance.py

@@ -1,8 +1,10 @@
 from datetime import datetime, timedelta, timezone
+from types import SimpleNamespace
 
 from bot.handlers.admin.sync_admin import (
     _coerce_panel_telegram_id,
     _description_matches,
+    _should_update_lifetime_used_traffic,
     _subscription_update_delta,
 )
 from db.models import Subscription
@@ -69,3 +71,54 @@ def test_subscription_update_delta_returns_only_changed_fields():
         "is_active": False,
         "status_from_panel": "EXPIRED",
     }
+
+
+def test_lifetime_traffic_update_waits_for_time_window_for_small_delta():
+    now = datetime(2026, 5, 20, 12, 0, tzinfo=timezone.utc)
+    settings = SimpleNamespace(
+        PANEL_SYNC_LIFETIME_TRAFFIC_MIN_INTERVAL_SECONDS=3600,
+        PANEL_SYNC_LIFETIME_TRAFFIC_MIN_DELTA_BYTES=100 * 1024 * 1024,
+    )
+    user = SimpleNamespace(
+        lifetime_used_traffic_bytes=10 * 1024 * 1024,
+        lifetime_used_traffic_synced_at=now - timedelta(minutes=15),
+    )
+
+    assert not _should_update_lifetime_used_traffic(
+        user,
+        11 * 1024 * 1024,
+        now=now,
+        settings=settings,
+    )
+    assert _should_update_lifetime_used_traffic(
+        user,
+        11 * 1024 * 1024,
+        now=now + timedelta(hours=1),
+        settings=settings,
+    )
+
+
+def test_lifetime_traffic_update_allows_large_delta_and_skips_duplicate_panel_identity():
+    now = datetime(2026, 5, 20, 12, 0, tzinfo=timezone.utc)
+    settings = SimpleNamespace(
+        PANEL_SYNC_LIFETIME_TRAFFIC_MIN_INTERVAL_SECONDS=3600,
+        PANEL_SYNC_LIFETIME_TRAFFIC_MIN_DELTA_BYTES=100 * 1024 * 1024,
+    )
+    user = SimpleNamespace(
+        lifetime_used_traffic_bytes=10 * 1024 * 1024,
+        lifetime_used_traffic_synced_at=now,
+    )
+
+    assert _should_update_lifetime_used_traffic(
+        user,
+        200 * 1024 * 1024,
+        now=now,
+        settings=settings,
+    )
+    assert not _should_update_lifetime_used_traffic(
+        user,
+        0,
+        now=now + timedelta(hours=2),
+        settings=settings,
+        is_duplicate_panel_identity=True,
+    )