use eligibility year to create previous THHG and remove date check

[vkghub]

PR Checklist

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PR Type

What kind of change does this PR introduce?:

• Bugfix
• Feature (requires Feature flag)
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What is the ticket # detailing the issue?

Ticket: https://app.clickup.com/t/868hg3pd6 & https://app.clickup.com/t/868hg3pgz

A brief description of the changes:

New behavior: fix previous year eligibility bug

Feature Flag

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Variable name:

• DC
• ME

Additional Context

Include any additional context that may be relevant to the peer review process.

[satish2025-crew]

lgtm

[saipraveen18]

lgtm 👍