Quiet idempotent setup reconciliation

[codeforester]

Summary

• Skip brew bundle during setup when brew bundle check says the project Brewfile is already satisfied.
• Disable Homebrew auto-update for Brewfile check/reconciliation paths.
• Skip uv sync when uv sync --check says the uv project environment is already synchronized.

Validation

• PYTHONPATH=lib/python:cli/python /Users/rameshhp/.base.d/base/.venv/bin/python -m pytest cli/python/base_setup/tests/test_brewfile.py cli/python/base_setup/tests/test_uv.py -q
• git diff --check HEAD~1..HEAD
• env -u BASE_HOME ./bin/base-test
• /Users/rameshhp/work/base/bin/basectl setup bankbuddy

Demo Impact

• None. Existing BankBuddy setup dogfood now emits concise satisfied/synchronized messages on repeat setup runs.

Fixes #1019