4.x: Fix entropy-beauty-scan wrong diff issue, via Grok

[akarnokd]

Also update the README.md with Streamable and new Scheduler info.

[github-actions]

🐷 TruffleHog + Entropy Beauty Scan

Average entropy of changed code: 4.755 bits/char
Verdict: ⚠️ Consider review — entropy outside sweet spot

Changed files entropy:

.github/workflows/scorecard.yml: 4.755

✅ No secrets or suspicious high-entropy strings found.

Mid-4 beauty heuristic in action — powered by our entropy chats! 😊

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.70%. Comparing base (7e8b750) to head (7a182a8).
⚠️ Report is 1 commits behind head on 4.x.

Additional details and impacted files

@@            Coverage Diff            @@
##                4.x    #8227   +/-   ##
=========================================
  Coverage     98.70%   98.70%           
+ Complexity     7097     7095    -2     
=========================================
  Files           814      814           
  Lines         50026    50026           
  Branches       6764     6764           
=========================================
  Hits          49380    49380           
  Misses          447      447           
  Partials        199      199           

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