fix(db): do not create bridge_port index in 003 before column exists

Made-with: Cursor

internal/store/sql/003_scan_port_devices.sql

@@ -14,6 +14,3 @@ create index if not exists idx_scan_port_devices_scan_ip_if
 
 create index if not exists idx_scan_port_devices_scan_ip_mac
   on scan_port_devices (scan_id, ip, mac);
-
-create index if not exists idx_scan_port_devices_scan_ip_br
-  on scan_port_devices (scan_id, ip, bridge_port);