v0.12.0

Added

• .gatehouse-ignore: gitignore-syntax paths that are never reviewed.
  Matching files leave the diff and the file listing before any agent runs;
  on crunchtools/petit#61 that cuts each agent's diff from 263 KB of deleted
  fingerprint data to 3 KB. A change is skipped only when every path it
  touches matches, changes to the ignore file itself are always reviewed,
  and in CI the file comes from the base branch so a PR cannot hide its own
  changes. The posted review says how many files were skipped (when every changed
  file is ignored, nothing is posted).
• Under a trusted base (GATEHOUSE_CONTEXT_REPO/REF), the styleguide,
  ignore file and auto-discovered constitution come only from the base; a
  missing base copy no longer falls back to the working tree. An explicit
  --constitution path still wins, as before.