Find the cause of Issue 90901 where 'true' is passed as the value for diaries

[evansmith]

Issue Description

Issue 90901 (https://github.com/department-of-veterans-affairs/va.gov-team/issues/90901) saw a bug where true was being passed in for the value of diaries in the DependentsSerializer. A fix was deployed to prevent any further errors. This ticket is to research the cause of that issue and correct it.

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Tasks

• [ ] Confirm the cause of the issue of true being passed for diaries
• [ ] Correct the issue so that it no longer happens.

Acceptance Criteria

• [ ] What will be created or happen as a result of this story?

[evansmith]

@steele-lm @sanjabaj2 The logging of diaries should go into production this afternoon and then we should get some good info back about why the initial bug happened. Should we close https://github.com/department-of-veterans-affairs/va.gov-team/issues/90901 in favor of this ticket?