Split the oversized CLI edge without changing the public command surface.

This slice keeps argparse. Python's standard parser already supports subcommands, and changing to Click or Typer would be a user-visible parser migration rather than a structural cleanup.

src/codealmanac/cli/
  main.py              process entrypoint and error formatting
  parser/
    root.py            root parser composer
    lifecycle.py       init/build/ingest/garden/sync
    wiki.py            list/search/show/topics/health/reindex/serve/tag/untag
    admin.py           doctor/update/jobs/automation
  dispatch/
    root.py            parsed command to service/workflow requests
  render/
    root.py            stdout/stderr rendering helpers

• main.py stays a thin process edge: parse, call dispatch, format known errors.
• Parser construction is split by command domain and guarded by architecture tests.
• Dispatch and render are separated from main.py, but still broad. Split them by command domain only when a later CLI change creates real pressure.
• Tests continue to import build_parser and main from codealmanac.cli.main, so the public Python entrypoint remains stable.

Run:

uv run pytest tests/test_architecture.py tests/test_cli.py tests/test_public_contract.py
uv run ruff check src/codealmanac/cli tests/test_architecture.py tests/test_cli.py tests/test_public_contract.py
uv run pytest
uv run ruff check .
git diff --check