fix(sync-check): ignore generated python and elisp artifacts

Pre-commit caught a false-positive on its first real-world run. The
.ai/scripts/__pycache__ directory created by make test (pytest writes
.pyc and .pytest_cache, emacs writes .elc) was flagged as drift
against the canonical's clean tree.

Added matching --exclude patterns to the diff -rq check and the --fix
rsync calls. Patterns: __pycache__, *.pyc, *.pyo, .pytest_cache, *.elc.
The --fix excludes prevent rsync's --delete from wiping the mirror's
__pycache__ when the canonical has none.

Four new bats tests cover the exclusions. All 12 pass.

0 files changed, 0 insertions, 0 deletions