DSH Changeproof

Key features

• Change "A" file, test run B file, green but undetected.
• Step 4 add local path after the other side gets a plugin directory
• Coverage appropriate for Istanbul (vitest/jest) and coverage.py (pytest)
• argv-onlycommand is anargv array, directly spawn execution, no shell string spell without shell
• The test ran, but only part of the change line was executed. The remaining lines were not detected and reported as approved.