Extend job postings schema

[RishiDesai17]

Feature Title[Follow conventional title. See: https://www.conventionalcommits.org/en/v1.0.0/]

Extend the DB schema for Job Postings to accommodate new fields

Type of Change

• New feature (non-breaking change which adds functionality)
• Fixes Bug (Fixes an existing functionality which was not working as expected)
• Documentation change (Changes to Readme.md)

Describe your changes

Added an optional field "validTill" of the type 'date' and a field "isExpired" of the type 'boolean' with default value false

Resolves #136

Checklist

• I have taken a (git pull origin main --rebase) from main branch and tested it.
• I have conducted a self-review of my code, and the code contains only changes relevant to this feature, without including modifications to other files.
• I have commented my code, particularly in complex areas.
• I have checked for compatibility with other parts of the codebase by manually running the site and doing actions not related to my changes.

[amandesai01]

@RishiDesai17 run yarn format once. This is the case because you most probably didn't install deps. Because we have automation to auto-fix formatting before commit.

[amandesai01]

@RishiDesai17 you available to do this?

[shivam-sharma7]

@RishiDesai17 you available to do this?

@RishiDesai17 Also, you have to resolve the conflicts.

[RishiDesai17]

@devshahofficial @shivam-sharma7 Sure, will do these things and push it

[RishiDesai17]

Opening a new PR for clear flow