refactor: make store polymorphic

[tusharmath]

Summary:
Briefly describe the changes made in this PR.

Issue Reference(s):
Fixes #... (Replace "..." with the issue number)

Build & Testing:

• [ ] I ran cargo test successfully.
• [ ] I have run ./lint.sh --mode=fix to fix all linting issues raised by ./lint.sh --mode=check.

Checklist:

• [ ] I have added relevant unit & integration tests.
• [ ] I have updated the documentation accordingly.
• [ ] I have performed a self-review of my code.
• [ ] PR follows the naming convention of <type>(<optional scope>): <title>

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 93.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 85.73%. Comparing base (ff14331) to head (c224978).

Files	Patch %	Lines
src/core/ir/jit/synth.rs	91.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2258 +/- ## ========================================== + Coverage 85.69% 85.73% +0.03% ========================================== Files 219 219 Lines 21043 21033 -10 ========================================== - Hits 18033 18032 -1 + Misses 3010 3001 -9 ```

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