Implement Fee Schedule History (table, trigger, and backfill of 2025-01-03 snapshot)

Introduce Fee Schedule History so that fee schedule changes are auditable:
add a history table and trigger to record changes going forward, and backfill the table with the 2025-01-03 snapshot produced in https://github.com/bcgov/entity/issues/32829.

Scope
- Database (migration)
- [ ] Create Fee Schedule History table (schema and columns as per design).
- [ ] Add trigger(s) on the relevant fee schedule table(s) to insert/update history rows on INSERT/UPDATE/DELETE.

- Backfill
- [ ] After the migration is deployed to the target environment, run a one-time load to insert the data from Ticket 32829 export into the history table, with effective/snapshot date 2025-01-03, as the first historical records.

No files or tests are named. Review the fee schedule table design and relevant migration entry points, then inspect the Ticket 32829 export; done means the history table and change triggers are deployed and the 2025-01-03 snapshot is loaded as the first historical records.

Written by the indexing model from the issue text.