backbone-digest 0.3.0

KPI digests — the periodic KPI-email engine: a declarative name-keyed KPI registry other modules extend, per-recipient fenced rendering with declared (never row-count) KPI drops, the anti-spam slowdown ladder, a shared tips carousel, and a daily plain-pull cron whose due-date column is the queue (Odoo digest port)
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mod digest_state_state_machine;
mod digest_subscription_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 digest_state_state_machine::{digest_stateState, digest_stateTransition, digest_stateStateMachine};
pub use digest_subscription_state_state_machine::{digest_subscription_stateState, digest_subscription_stateTransition, digest_subscription_stateStateMachine};