// SPDX-License-Identifier: AGPL-3.0-or-later
// Copyright (c) 2026 ReifyDB
//! Physical-plan post-passes. Walks the lowered plan and applies expression-level rewrites - constant folding,
//! projection simplification - that were not worth doing during logical compilation. New optimisations register
//! through the same `walk_expressions_mut` interface so they can be composed without re-traversing the plan once
//! per pass.
use cratePhysicalPlan;