fix(config): add YAML config support for daemon auto-sync settings

[irbull]

Add ability to configure daemon.auto-sync, daemon.auto-commit, daemon.auto-push, and daemon.auto-pull via config.yaml.

Priority order: CLI flag > env var > YAML config > database config

Individual YAML settings allow fine-grained control without triggering the legacy "enable everything" behavior. Tests cover unified and individual settings, env var overrides, and CLI flag overrides.

[irbull]

Any thoughts on this? Essentially the problem is that the daemon needs to be started with the --auto-commit because it doesn't read it from the config.yaml. However, the daemon won't start with this setting if you have auto-start on. Took me a while to figure out how to even get this to work, because each time I killed the daemon (so I could start it with auto-commit) it automatically started without this setting.

There is bd config set daemon.auto-commit true but this just sets the flag in the config.yaml, which isn't read (until this is merged ;).