feat(wallet): Improve how we're refreshing wallet's ongoing balance

[rsempe]

This pull request introduces a new feature to flag wallets that are ready to be refreshed and updates the related logic across the codebase. The most important changes include adding a new ready_to_be_refreshed attribute to the Wallet model, updating the job and service logic to handle this new attribute.

Model Changes:

• app/models/wallet.rb: Added a new scope ready_to_be_refreshed and a new boolean attribute ready_to_be_refreshed with a default value of false.

Job and Service Logic Updates:

• app/jobs/clock/refresh_wallets_ongoing_balance_job.rb: Updated the job to process only wallets that are ready to be refreshed.
• app/services/events/post_process_service.rb: Added a new method flag_wallets_for_refresh to set the ready_to_be_refreshed attribute to true for active wallets. [1] [2]
• app/services/wallets/balance/update_ongoing_service.rb: Set the ready_to_be_refreshed attribute to false after updating the wallet balance.

Database Migration:

• db/migrate/20241014093451_add_ready_to_be_refreshed_to_wallets.rb: Added a migration to introduce the ready_to_be_refreshed column and its index.