Validate malformed CLI arguments before inspection

[rogerchappel]

Summary

• reject missing values for --scenario, --output, and --format before inspection starts
• accept only the documented json and markdown formats
• reject trailing arguments for fixed-form scenarios, version, and help commands
• cover malformed inputs, no-report side effects, and valid format behavior

Commits

• 255bb97 test: cover malformed CLI arguments
• 6ea8cc1 fix: validate CLI arguments before inspection

Verification

• npm test
• npm run release:check
• git diff --check origin/main..HEAD
• verified all proposed commit authors and committers are Roger Chappel <miscanalysis@gmail.com>