fix(send): _NoDefault serializer sentinel introduced in order to make…

[marcosschroh]

… possible to send raw data even when a global serializer has been set

This PR address the case when the end user wants to send raw data when a global serializer has been set.

Use cases:

• Multiple topics that expect serialized data, except one: In this case it makes sense to configure a global serializer (StreamEngine) and then produce raw when is needed send(serialzer=None)
• DLQ: to produce raw data (bytes) after a deserialization has failed

[github-actions]

PR Preview Action v1.6.0
🚀 View preview at https://kpn.github.io/kstreams/pr-preview/pr-280/
Built to branch gh-pages at 2025-02-03 10:51 UTC. Preview will be ready when the GitHub Pages deployment is complete.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.21%. Comparing base (e308740) to head (ca3f707).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #280      +/-   ##
==========================================
+ Coverage   96.05%   96.21%   +0.15%     
==========================================
  Files          24       24              
  Lines         964      977      +13     
==========================================
+ Hits          926      940      +14     
+ Misses         38       37       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Masqueey]

Found some spelling errors, but in general a very nice PR with good documentation.