//! Cost analytics repository.
//!
//! Aggregates microdollar-precision AI request costs from `ai_requests`.
//! [`platform`] holds platform-wide rollups; [`per_user`] holds the
//! user-scoped cost and conversation-context queries.
//!
//! Copyright (c) systemprompt.io — Business Source License 1.1.
//! See <https://systemprompt.io> for licensing details.
use crateResult;
use PgPool;
use Arc;
use DbPool;