//! MongoDB backend implementations for Rustvello.
//!
//! Provides all five backend components backed by MongoDB:
//! - [`MongoBroker`] — FIFO invocation queue via MongoDB collections
//! - [`MongoOrchestrator`] — Invocation lifecycle management
//! - [`MongoStateBackend`] — Invocation/call persistence in MongoDB documents
//! - [`MongoClientDataStore`] — Content-hash key-value store
//! - [`MongoTriggerStore`] — Trigger and condition persistence
//!
//! Suitable for distributed, multi-process deployments.