- Remove stale line-number coverage comments (# Targets: line NNN, hit=0)
- Remove useless file-existence checks from verilog/sdf tests
- Delete 21 orphaned dcalc Tcl tests (C++ tests already cover them)
- Rename liberty_ccsn_ecsm -> liberty_ccsn (no ECSM libs available)
- Fix liberty_sky130_corners to use define_corners/-corner for real multi-corner testing
- Add report_checks per wireload model in liberty_wireload
- Fix test/regression to work from test/ directory (label mismatch)
- Refactor all module CMakeLists.txt with sta_module_tests() macro
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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