Correct rate limit retry documentation

[dreikanter]

Changes:

• Remove the inaccurate claim that recurring schedulers always restart a job after rate-limit retry exhaustion.

Why:

The retry helper reports and stops after the attempt cap; not every including job has a recurring scheduler.

References:

• Related issue: Review the code structure #1010 (F-104)

Checks:

• Executable code is unchanged.
• GitHub Actions will verify the branch.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.55%. Comparing base (ce0547a) to head (bae5ffe).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1088   +/-   ##
=======================================
  Coverage   97.55%   97.55%           
=======================================
  Files         355      355           
  Lines        8358     8358           
=======================================
  Hits         8154     8154           
  Misses        204      204           

Files with missing lines	Coverage Δ
app/jobs/rate_limited.rb	100.00% <ø> (ø)

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