Type Alias DynEmbedder 

pub type DynEmbedder = Box<dyn Embedder + Send + Sync>;

A boxed, object-safe embedder. Lets a non-generic MemoryService<DynEmbedder> be stored behind a concrete type — the MCP server and the language bindings both need this, since handler/pyclass types can’t carry a generic E.

Aliased Type

pub struct DynEmbedder(/* private fields */);