backbone-events 0.4.0

Events core + the sale/booth/crm/sms/desk overlay — registrations under one authoritative seat counter, the sale seam (order-minted registrations, forward-only paid heal, SO-cancel mirror cascade), booth bookings with the DB exclusivity wall, closed-vocabulary lead rules through a host sink port, the dual-channel (mail/sms) self-arming scheduler, and the exact-match desk verb (Odoo event port, core + overlay)
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mod booth_state_state_machine;
mod registration_state_state_machine;

/// Shared error type for all state machines in this module
#[derive(Debug, Clone, thiserror::Error)]
pub enum StateMachineError {
    #[error("Invalid state: {0}")]
    InvalidState(String),

    #[error("Invalid transition: {0}")]
    InvalidTransition(String),

    #[error("Transition '{transition}' not allowed from state '{from}'")]
    TransitionNotAllowed {
        transition: String,
        from: String,
    },

    #[error("Role '{role}' not authorized for transition '{transition}'")]
    RoleNotAuthorized {
        role: String,
        transition: String,
    },

    #[error("Guard condition failed for transition '{0}'")]
    GuardFailed(String),

    #[error("Cannot transition from final state '{0}'")]
    FinalStateReached(String),
}

pub use booth_state_state_machine::{booth_stateState, booth_stateTransition, booth_stateStateMachine};
pub use registration_state_state_machine::{registration_stateState, registration_stateTransition, registration_stateStateMachine};