perf: use a-hash in store

[laststylebender14]

Summary:
Briefly describe the changes made in this PR.

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

Build & Testing:

• [x] 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

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 86.87%. Comparing base (fb0974d) to head (ea300b4).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #3101 +/- ## ======================================= Coverage 86.87% 86.87% ======================================= Files 276 276 Lines 26873 26873 ======================================= Hits 23347 23347 Misses 3526 3526 ```

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[github-actions[bot]]

Bencher Report

Branch	3101/merge
Testbed	benchmarking-runner

⚠️ WARNING: The following Measure does not have a Threshold. Without a Threshold, no Alerts will ever be generated!

• Latency

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Benchmark	Latency	nanoseconds (ns)
from_json_bench	📈 view plot ⚠️ NO THRESHOLD	6,211,900.00
group_by	📈 view plot ⚠️ NO THRESHOLD	486.82
input/args.missing	📈 view plot ⚠️ NO THRESHOLD	22.12
input/args.nested.existing	📈 view plot ⚠️ NO THRESHOLD	41.48
input/args.nested.missing	📈 view plot ⚠️ NO THRESHOLD	37.68
input/args.root	📈 view plot ⚠️ NO THRESHOLD	38.32
input/headers.existing	📈 view plot ⚠️ NO THRESHOLD	30.48
input/headers.missing	📈 view plot ⚠️ NO THRESHOLD	30.17
input/value.missing	📈 view plot ⚠️ NO THRESHOLD	25.23
input/value.nested.existing	📈 view plot ⚠️ NO THRESHOLD	42.67
input/value.nested.missing	📈 view plot ⚠️ NO THRESHOLD	37.94
input/value.root	📈 view plot ⚠️ NO THRESHOLD	38.67
input/vars.existing	📈 view plot ⚠️ NO THRESHOLD	8.69
input/vars.missing	📈 view plot ⚠️ NO THRESHOLD	8.72
synth_nested	📈 view plot ⚠️ NO THRESHOLD	89,717.00
synth_nested_borrow	📈 view plot ⚠️ NO THRESHOLD	36,317.00
test_batched_body	📈 view plot ⚠️ NO THRESHOLD	1,900.40
test_batched_body #2	📈 view plot ⚠️ NO THRESHOLD	1,553,900.00
test_data_loader	📈 view plot ⚠️ NO THRESHOLD	385,060.00
test_handle_request	📈 view plot ⚠️ NO THRESHOLD	131,510.00
test_handle_request_jit	📈 view plot ⚠️ NO THRESHOLD	60,505.00
test_http_execute_method	📈 view plot ⚠️ NO THRESHOLD	15,302.00
with_mustache_expressions	📈 view plot ⚠️ NO THRESHOLD	1,117.50
with_mustache_literal	📈 view plot ⚠️ NO THRESHOLD	746.35

🐰 View full continuous benchmarking report in Bencher

[laststylebender14]

closing this since there's no performance improvement.