Restrict MaxOperationsPerDrain to Greater Than Zero

[nibanks]

Description

Fixes #4705 by disallowing the app to set a value of zero.

Testing

Added

Documentation

N/A

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.55%. Comparing base (21e5b41) to head (c4b51ce).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4706      +/-   ##
==========================================
- Coverage   87.05%   86.55%   -0.50%     
==========================================
  Files          56       56              
  Lines       17361    17363       +2     
==========================================
- Hits        15114    15029      -85     
- Misses       2247     2334      +87     

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[guhetier]

Should the documentation be updated to mention that zero is not a valid value?

[nibanks]

Should the documentation be updated to mention that zero is not a valid value?

Nah, I don't think it's really necessary. Zero is fundamentally a bad value. That's essentially saying the max work you're allowed to do is nothing.