The old HookDefinition struct has HookType flattened via
#[serde(flatten)], so emitting hook_type = Some(HookType::Command {...})
produces an inner 'command' key at the same level as the outer
HookDefinition.command shorthand field. Round-tripping through YAML
then fails with 'duplicate field command'.
Bridge script/command hooks via the HookDefinition.command shorthand
instead, leaving hook_type = None. Also: sandbox FABRO_CONFIG in the
manifest_builder unit test so it doesn't pick up the developer's real
~/.fabro/settings.toml, and update settings_local_merges_cli_and_project_defaults
to reflect v2 R22 semantics: run.inputs replaces wholesale across
layers rather than merging by key, while daytona.labels stays a sticky
merge-by-key map per R71.
f467bd23c5