refactor: expose a Stream.get_middleware function

[woile]

No description provided.

[github-actions]

PR Preview Action v1.4.8
🚀 Deployed preview to https://kpn.github.io/kstreams/pr-preview/pr-209/
on branch gh-pages at 2024-10-07 09:10 UTC

[codecov]

Codecov Report

Attention: Patch coverage is 93.75000% with 1 line in your changes missing coverage. Please review.

Project coverage is 95.93%. Comparing base (ca4a4a4) to head (0dd0ac8).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
kstreams/streams.py	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #209      +/-   ##
==========================================
+ Coverage   95.79%   95.93%   +0.14%     
==========================================
  Files          24       24              
  Lines         927      935       +8     
==========================================
+ Hits          888      897       +9     
+ Misses         39       38       -1     

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