feat(rules): Revise query for optimization

[yquansah]

Revise query to collect ruleIDs, and then use those collected IDs in subsequent query for the segments/constraints. We sort the rules at the end via the rank, so we can actually just remove the OrderBy clause in the first query to optimize.

Before this, the subquery here was not filtering rules based on flag_key or namespace_key.

[codecov]

Codecov Report

Merging #1979 (24159c6) into segment-anding (99564ea) will increase coverage by 0.09%.
Report is 71 commits behind head on segment-anding.
The diff coverage is 76.36%.

@@                Coverage Diff                 @@
##           segment-anding    #1979      +/-   ##
==================================================
+ Coverage           71.07%   71.16%   +0.09%     
==================================================
  Files                  67       68       +1     
  Lines                6541     6742     +201     
==================================================
+ Hits                 4649     4798     +149     
- Misses               1629     1672      +43     
- Partials              263      272       +9     

Files Changed	Coverage Δ
internal/cmd/auth.go	0.00% <0.00%> (ø)
internal/storage/sql/migrator.go	20.00% <ø> (ø)
internal/ext/importer.go	71.11% <54.54%> (-2.99%)	⬇️
internal/ext/exporter.go	85.47% <68.00%> (-3.07%)	⬇️
internal/server/evaluation/evaluation.go	90.45% <70.96%> (-0.42%)	⬇️
internal/storage/fs/snapshot.go	68.08% <72.94%> (-0.13%)	⬇️
internal/s3fs/s3fs.go	68.21% <82.00%> (+2.88%)	⬆️
internal/ext/common.go	84.61% <84.61%> (ø)
internal/config/storage.go	81.42% <100.00%> (+1.74%)	⬆️
internal/server/evaluation/legacy_evaluator.go	98.50% <100.00%> (+0.07%)	⬆️
... and 1 more

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