chore: add datastore LR implementation

[tstirrat15]

Description

Part of getting all LR implementations done.

Changes

• Add datastore LR implementation

Testing

Review.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 21 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.84%. Comparing base (b1837a8) to head (87862d1).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/query/datastore.go	0.00%	21 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2814      +/-   ##
==========================================
- Coverage   75.91%   75.84%   -0.06%     
==========================================
  Files         459      459              
  Lines       54714    54734      +20     
==========================================
- Hits        41530    41510      -20     
- Misses      10321    10356      +35     
- Partials     2863     2868       +5     

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