Function declared_effect_steps 

pub(super) fn declared_effect_steps(
    app: &AppRuntime,
    schema: &AppSchema,
    request: &HttpRequest,
    action_id: &str,
    input_overrides: &BTreeMap<String, Option<String>>,
    anchor: i64,
    actor_id: i64,
) -> Result<Vec<Mutation>, i32>

Converts the shared action-effect preparation into insertion-only logical operations. This reads declarations, never an app-state projection.