test: Optimize test file sizes for faster CI execution (batch 2)

[nathan-stender]

Summary

This PR continues the test file optimization effort to reduce CI execution time by optimizing large test data files while maintaining test coverage.

Changes

Optimized 5 large test files by reducing redundant data rows while keeping representative samples:

Files Optimized

1. Perkin Elmer Envision luminescence_example01.csv

   • Reduced from 263 to 151 lines (kept rows A, E, I, M from 16-row plates)
   • JSON: 3.95MB → 965KB (76% reduction)

2. Methodical Mind methodical_test_2.txt

   • Reduced from 8 to 4 representative rows (A, C, E, G)
   • JSON: 1.77MB → 867KB (51% reduction)

3. Agilent Gen5 endpoint_singleplate_filter.txt

   • Reduced 384-well plate from 16 to 5 rows (A, D, H, L, P)
   • JSON: 1.8MB → 567KB (69% reduction)

4. Agilent Gen5 endpoint_fluorescence_polarization.txt

   • Reduced 384-well plate from 16 to 5 rows
   • JSON: 3.6MB → 1.1MB (69% reduction)

5. BMG MARS 24-10-16 15-09-52 Luminescence 1536.csv

   • Reduced 1536-well plate from 32 to 6 rows (A, G, M, S, Y, e)
   • JSON: 2.4MB → 460KB (81% reduction)

Impact

• Total JSON size reduced: ~14.6MB reduced to ~3.9MB (73% overall reduction)
• Test coverage maintained: All tests pass with optimized files
• CI speed improvement: Significantly faster test execution due to smaller files

Testing

• ✅ All parser tests pass with optimized files
• ✅ Representative data patterns preserved for proper test coverage
• ✅ Linting and type checking pass

Related

• Follows up on test: Optimize large test files to reduce CI execution time #1144 (first batch of optimizations)
• Part of ongoing effort to reduce CI execution time

[nathan-stender]

Closing in favor of a new PR with rebased branch to fix workflow issues.