[REFACTOR] Merge artifact-scan into binary-scan — redundant commands with overlapping scope

[Wolfvin]

Problem

artifact-scan and binary-scan serve overlapping purposes:

• artifact-scan: 'Scan for compiled/built artifacts (reverse engineering mode)'
• binary-scan: 'Scan for binary/compiled artifacts with Tauri/Electron RE analysis'

Both return the same top-level stats shape (total_artifacts, binaries, minified_files). binary-scan is a strict superset — it includes everything artifact-scan does plus Tauri/Electron-specific analysis.

Expected Fix

• Merge artifact-scan logic into binary-scan
• Deprecate artifact-scan with a clear message pointing to binary-scan
• Schedule artifact-scan removal in next major version

Benefit

Reduces command count, removes confusion about which command to use.