agent bulkloader - better errors?

## Source

 load fail::ERROR: Invalid address: empty Where: PL/pgSQL function trigger_fct_tr_agent_attribute_biud() line 46 at RAISE 

## Summary

what's this?

[cf_temp_agent_download.csv](https://github.com/user-attachments/files/24574357/cf_temp_agent_download.csv)