Galley

🚢 This patch tightens scope handling, executor result parsing, and task YAML compatibility.

Changes

• Treat scope.allowed_paths as the expected implementation scope and review baseline, while keeping scope.forbidden_paths protected.
• Require valid structured executor result JSON instead of generating fallback completion evidence.
• Define files_modified as the final worktree diff submitted for supervisor review, so scope_expansions covers retained changes from earlier attempts.
• Remove executor.max_budget_usd from the active task contract, runner flags, schemas, skeletons, examples, and docs.
• Decode known task YAML fields while ignoring unknown fields at runtime.
• Package Galley plugins as version 0.1.19.

Fixes

• Preserve Codex --output-last-message parse errors in executor diagnostics.
• Preserve staged deletions during review staging and accepted-task finalization.