4.x: Streamable ~ take native implementation

[akarnokd]

Reimplement the take operator as native pull-pull for efficiency and control.

The original implementation was mainly to verify transform can do it, but it introduced a pull-to-push-to-pull step via a scheduler to drive it unnecessarily.

[github-actions]

🐷 TruffleHog + Entropy Beauty Scan

Average entropy of changed code: 4.992 bits/char
Verdict: ⚠️ Consider review — entropy outside sweet spot

Changed files entropy:

README.md: 4.992

✅ 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 98.71%. Comparing base (24e05e9) to head (b7026f2).

Additional details and impacted files

@@             Coverage Diff              @@
##                4.x    #8226      +/-   ##
============================================
+ Coverage     98.69%   98.71%   +0.02%     
- Complexity     7095     7097       +2     
============================================
  Files           813      814       +1     
  Lines         50017    50026       +9     
  Branches       6764     6764              
============================================
+ Hits          49362    49385      +23     
+ Misses          452      447       -5     
+ Partials        203      194       -9     

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