Update checks.py

[jcadam14]

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Closes #1707

Fixed post-process to collect() on check results first before setting CheckResult references. Using the initial check_output lazyframe for check_output, check_passed, and failure_cases was causing pandera/backends/polars/base.py run_check calls to collect() for each of these references to call the check functions. So failures were causing the check functions to run three separate times.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 82.59%. Comparing base (812b2a8) to head (38db3a2). Report is 150 commits behind head on main.

Files with missing lines	Patch %	Lines
pandera/backends/polars/checks.py	0.00%	3 Missing :warning:

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1719       +/-   ##
===========================================
- Coverage   94.28%   82.59%   -11.69%     
===========================================
  Files          91      117       +26     
  Lines        7013     8716     +1703     
===========================================
+ Hits         6612     7199      +587     
- Misses        401     1517     +1116     

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[cosmicBboy]

thanks @jcadam14 and congrats on your first PR to pandera! 🚀

[jcadam14]

thanks @jcadam14 and congrats on your first PR to pandera! 🚀

Glad to help!