[Part 2] Populate aod_based_on_age column

[yoomlam]

Resolves #14637

Part 1

Description

Only for AMA appeals -- AOD status of legacy appeals can be found in VACOLS.
Add and use Appeal.conditionally_set_aod_based_on_age method to set the new aod_based_on_age table column when loaded by the user.
Add a job to set aod_based_on_age nightly for claimants who meet the age criteria.

Acceptance Criteria

• When aod_based_on_age is true, the appeal should show the AOD label/badge in the UI.
• aod_based_on_age is true when appeal.claimant.advanced_on_docket_based_on_age? is true, after appeal.advanced_on_docket? is called.
• After job is run, all active appeals associated with claimants age 75 and over will be marked as AOD (i.e., aod_based_on_age is true).

Testing Plan

1. rails db:migrate
2. In Rails console, check the value of aod_based_on_age before and after changing things that would affect (and not affect) aod_based_on_age (also check the UI for an AOD label):

> a=FactoryBot.create(:appeal, :with_schedule_hearing_tasks, :advanced_on_docket_due_to_age)
> a.uuid
=> "64881a96-49a5-4442-b7d4-41eea483eee0" # Use this to check the UI at http://localhost:3000/queue/appeals/64881a96-49a5-4442-b7d4-41eea483eee0
> a.aod_based_on_age
=> nil
> a.advanced_on_docket?
=> true
> a.aod_based_on_age
=> true

> a.claimant.person.update(date_of_birth: 74.years.ago)
=> true
> a.aod_based_on_age
=> true
> a.advanced_on_docket?
=> false
> a.aod_based_on_age
=> false

> a2=FactoryBot.create(:appeal, :with_schedule_hearing_tasks, :advanced_on_docket_due_to_age)
> a2.id
=> 708
> a2.uuid
=> "bccc4d86-ace1-41ce-99cf-cf013292b130"  # Use this to check the UI at http://localhost:3000/queue/appeals/bccc4d86-ace1-41ce-99cf-cf013292b130
> a2.aod_based_on_age
=> nil
> SetAppealAgeAodJob.new.perform_now
Performing SetAppealAgeAodJob (Job ID: fe8ff15c-6057-43f8-9b8c-594f4b4122d7) from Shoryuken(default)
SetAppealAgeAodJob completed after running for less than a minute.
IDs of age-related AOD appeals: [24, 708]
Performed SetAppealAgeAodJob (Job ID: fe8ff15c-6057-43f8-9b8c-594f4b4122d7) from Shoryuken(default) in 169.88ms
=> nil

Remember to rake db:rollback when done.

Code Documentation Updates

• Add or update code comments at the top of the class, module, and/or component.

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[hschallhorn]

Some initial feedback before testing!

[hschallhorn]

can we add a quick expect(claimant.advanced_on_docket_based_on_age?).to eq(false) check here?

[hschallhorn]

Additional AC:

• a.advanced_on_docket? doesn't make any database requests to other tables if the vet is aod based on age once age_aod is set! ⏩

[hschallhorn]

Added some changes!

[hschallhorn]

!! Glad we found a simpler way to implement this! Nice work!