WASM Component Model loader for the uni-db plugin framework.

uni-plugin-wasm provides the host-side machinery to load WASM plugins built against the uni:plugin WIT worlds. The boundary uses:

• WIT-typed contracts for each plugin kind (scalar, aggregate, procedure, locy-agg, hook, storage, …) — typed exports + capability- gated host imports.
• Arrow IPC over linear memory for RecordBatch exchange — host calls plugin's alloc(len), copies IPC bytes in, calls the work export, reads IPC bytes back at the returned (ptr, len).
• Pre-warmed instance pools to amortize the 10–100 ms wasmtime instantiation cost across hot-path UDF invocations.

Crate status

[WasmLoader::load] is fully wired behind the wasmtime-runtime feature (default-on): it instantiates a component, negotiates capabilities against the host grants, and registers the plugin's scalar / aggregate / procedure adapters end-to-end through the respective WIT worlds.