Prod - missing Director first name when data was migrated, prevents filing Director change

Problem Statement
We have a situation in Production whereas companies' Directors records are missing first names.
As a result, new Directors Changes cannot be filed.
This is not a mononym situation, as users are wiling to have a first name and a last name for these records.
Even as users attempt to correct the existing records, they cannot file Director Changes as there is a "previous_first_name cannot be NULL" condition that breaks the validation.
Ops tickets:
- [ITOPS-328245] SANDEEP GILL | Business Registry | 58743 | Unable to update Director information - Jira Service Management
- [ITOPS-311604] BC0851457 BCROS account # 135553 Unable to complete 2026 annual report or director update - Jira Service Management

Proposed Resolution - Short Term
Prod - missing Director first name when data was migrated, prevents filing Director change · bcgov/entity was created and Vysakh is working actively on it.
This will allow two scenarios to proceed:
Would allow a Director first name to be changed from NULL to a value, independent of other changes that might be part of that filing.
Would allow a Director first name to continue to be NULL, in filings where other Directors might be added or removed.
This change will not touch the User Interface, (UI), where current validations will stay in place.

@TVWerdal @vysakh-menon-aot