♻️ chore: Use make() to preallocate relevantExtractors in Session Middleware

[SivaPA08]

Preallocate relevantExtractors using make() to reduce unnecessary slice reallocations.

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Walkthrough

The session middleware preallocates the filtered extractor slice using the extractor chain length, reducing potential reallocations during appends.

Changes

Session extractor optimization

Layer / File(s)	Summary
Preallocate relevant extractors middleware/session/session.go	Initializes relevantExtractors with capacity for the extractor chain before filtering.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: efectn

Poem

A rabbit hops through slices bright,
Reserving room before the write.
Fewer moves beneath the moon,
Extractors gather in tune.
“Preallocate!” I cheer—“well done!”

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description is too brief and omits the required template sections like Fixes #, changes, type of change, checklist, and commit formatting.	Expand it to the repository template by adding the issue reference, change summary, type of change, checklist items, and any relevant benchmarks/tests.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly names the slice preallocation change in session middleware and matches the main PR objective.

✨ Finishing Touches

🧪 Generate unit tests (beta)

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.25%. Comparing base (48b5ea3) to head (2a8e240).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4562      +/-   ##
==========================================
- Coverage   93.29%   93.25%   -0.05%     
==========================================
  Files         140      140              
  Lines       14854    14854              
==========================================
- Hits        13858    13852       -6     
- Misses        620      625       +5     
- Partials      376      377       +1     

Flag	Coverage Δ
unittests	93.25% <100.00%> (-0.05%)	⬇️

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