CRITICAL: Test file exceeds architectural limits - test_pcolormesh_comprehensive.f90 at 501 lines

[krystophny]

PROBLEM: test_pcolormesh_comprehensive.f90 contains 501 lines, exceeding 500-line architectural hard limit by 0.2%. Test files violating size limits indicate systematic testing approach problems.

EVIDENCE:

• File size: 501 lines (wc -l verification)
• Hard limit: 500 lines maximum
• Violation: 1 line over absolute maximum
• Test consolidation gone wrong - comprehensive tests should be modular

SOLUTION:

1. Break comprehensive test into focused test modules
2. Create test_pcolormesh_basic.f90, test_pcolormesh_advanced.f90
3. Separate rendering tests from functionality tests
4. Extract common test utilities to shared module
5. Ensure each test file <200 lines for maintainability

TEST ARCHITECTURE VIOLATION: Monolithic tests violate maintainability and debugging efficiency.

[krystophny]

Duplicate of #928; consolidating test file size limit enforcement under #928.