v0.1.42

User-path correctness release:

• greenwash.pyz now propagates standard process exits: 0 for pass, 1 for block, and 2 for input or engine errors. hook-json deliberately remains exit 0 by protocol.
• greenwash doctor only marks the exact, tracked canonical pull_request gate healthy; ambiguous, untracked, or mutated workflow evidence fails closed.
• Terminal and hook-json finding counts now honor the active --fail-on threshold.
• Detector, verdict, and authority semantics were not broadened.
• The offline doctor intentionally trusts the previous stable Action commit (v0.1.41), a one-release trust lag; a later release can advance it to v0.1.42.