IBM I object library to be sent to InfoSphere Guardium iStap agent

On IBM I architecture object libraries (read schemas) have a very important role as they represent logical partitions of files (read table).
To date, iStap traffic has no information about the object library entry.
To get object library entry associated to an object name in Guardium reports QAUDJRN audit journal must be enabled and setup.

This approach is not acceptable for our customer for two main reason:
1. Activate QAUDJRN to collect object library has an not acceptable increasing cost on IBM I HW resources, jobs time execution, network and Guardium appliance resources
2. Since iStap traffic does not bring this info with it there is no way to partition SQL activity on a give file by libraries.
We worked with Guardium R&D team and IBM I SQL team lead (Scott Forstie) to find a solution working on Guardium side but what we found is only a not deterministic workaround.

For this reason customer is requesting an enhancement to have IBM I system able to provide object library info to stap - without activating QAUDJRN.
Some solutions we thought:
a) Use of exit programs
b) send library information as part of sql
i) use GuardiumAPI like SELECT 'GuardAppEvent:Start', 'GuardAppEventType:Db2zSqlseti', 'GuardAppEventStrValue:WSUSER=;WRKSTN=;APPL=;ACC=;PGM=;INF=QB00BATCH' FROM SYSIBM.SYSDUMMY1, to let stap getting the object library info
ii) use of a catalogue table or stored procedure to call to get a mapping of the default library and user
iii) other solutions
c) other solutions
Guardium team is willing to work with IBM I team to find such a kind of solution on this request.