Drop the config.spec/configobj configuration in favour of an
AppSettings pydantic-settings model (settings.py) loaded from
SMILEYFACE_-prefixed env vars or a .env file. Introduce AppContext
(context.py) to carry settings plus logging, dispatch commands through
a Click CLI (cli.py), and centralise log setup (logging_setup.py).
Update hub_machine, datalayer, and scraping modules to consume the new
context. Add .env.example and ignore .env.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
