Show all healthcheck cards sorted by severity and priority

[shrutipatel31]

Summary:
Previously, the overview analysis only displayed non-passing healthcheck cards. This change shows all healthcheck cards, sorted by severity and priority to surface the most important information first.

The sorting order is:

1. ErrorAnalysisCard (errors during computation)
2. FAIL status
3. WARNING status
4. PASS status with priority (BaselineImprovementAnalysis, EarlyStoppingAnalysis - these provide valuable progress metrics even when passing)
5. PASS status (rest)

This gives users visibility into the full health of their experiment while keeping critical issues at the top.

Differential Revision: D91750384

[meta-codesync]

@shrutipatel31 has exported this pull request. If you are a Meta employee, you can view the originating Diff in D91750384.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 96.55172% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 96.74%. Comparing base (5190f4b) to head (ad37fc1).

Files with missing lines	Patch %	Lines
ax/analysis/healthcheck/healthcheck_analysis.py	92.30%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4835      +/-   ##
==========================================
- Coverage   96.74%   96.74%   -0.01%     
==========================================
  Files         588      589       +1     
  Lines       61526    61551      +25     
==========================================
+ Hits        59524    59546      +22     
- Misses       2002     2005       +3     

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