This commit introduces a lookup using an adaption of left/right expansion searches to find a missing glue-column across several layers of relations.
You can now alert on data having a glue mapped to other entities as long as it resolves to 'device_id' in under 30 cycles.
First intention of usage is to alert on bill-usages.
The bills-table does not contain a valid 'device_id' glue and has to be resolved via 'bills.bill_id -> bill_ports.port_id -> ports.device_id'.
This example consumes 3+1 cycles.