fix finance balance delta recharges

backend/app/database.py

@@ -41,7 +41,7 @@ def get_db():
 def init_db():
     """Create all tables."""
     # import models so SQLAlchemy registers them
-    from app.models import admin_user, upstream, snapshot, webhook_config, notification_log, custom_page, website, revoked_token, upstream_key, external_api_log, finance_daily_summary  # noqa: F401
+    from app.models import admin_user, upstream, snapshot, webhook_config, notification_log, custom_page, website, revoked_token, upstream_key, external_api_log, finance_daily_summary, upstream_recharge_event  # noqa: F401
     Base.metadata.create_all(bind=engine)
     _ensure_indexes()
     _migrate_custom_pages()
@@ -60,6 +60,8 @@ _NEW_INDEXES = [
     "CREATE INDEX IF NOT EXISTS ix_key_upstream_name ON upstream_generated_keys(upstream_id, key_name)",
     "CREATE INDEX IF NOT EXISTS ix_external_api_logs_created_at_desc ON external_api_logs(created_at DESC)",
     "CREATE INDEX IF NOT EXISTS ix_external_api_logs_direction_created ON external_api_logs(direction, created_at DESC)",
+    "CREATE INDEX IF NOT EXISTS ix_balance_snap_upstream_captured ON upstream_balance_snapshots(upstream_id, captured_at DESC)",
+    "CREATE INDEX IF NOT EXISTS ix_recharge_upstream_date ON upstream_recharge_events(upstream_id, recharge_date)",
 ]
 
 
@@ -132,6 +134,8 @@ def _migrate_upstreams():
             conn.execute(text("ALTER TABLE upstreams ADD COLUMN balance_alert_threshold FLOAT"))
         if "balance_alert_notified" not in columns:
             conn.execute(text("ALTER TABLE upstreams ADD COLUMN balance_alert_notified BOOLEAN NOT NULL DEFAULT 0"))
+        if "finance_cost_mode" not in columns:
+            conn.execute(text("ALTER TABLE upstreams ADD COLUMN finance_cost_mode VARCHAR(32) NOT NULL DEFAULT 'usage_stats'"))
 
 
 def _migrate_upstream_generated_keys():