[IMP] energy_selfconsumption: Optimizing the CUPS import process and handling queued jobs

This commit improves the CUPS data import process,
I divide the work into small groups to improve memory management
and prevent timeouts in Odoo workers.

Changes made:
- Splits CUPS data into groups of 20 for asynchronous processing.
- Fix CUPS ID handling to ensure coefficients are assigned correctly.
- Add detailed logs to facilitate problem diagnosis.