refactor: rename llm worker crate to engine

crates/manifest/Cargo.toml

@@ -6,7 +6,7 @@ license.workspace = true
 
 [dependencies]
 arc-swap = "1"
-llm-worker = { workspace = true }
+llm-engine = { workspace = true }
 mlua = { version = "0.11.4", features = ["lua54", "vendored", "serialize"] }
 protocol = { workspace = true }
 serde = { workspace = true, features = ["derive"] }

crates/manifest/src/model.rs

@@ -14,9 +14,9 @@ use std::path::PathBuf;
 
 use serde::{Deserialize, Serialize};
 
-// `ModelCapability` は `llm-worker` 側に定義される runtime 構造だが、
+// `ModelCapability` は `llm-engine` 側に定義される runtime 構造だが、
 // マニフェストで任意に override できるよう型だけ再エクスポートする。
-pub use llm_worker::llm_client::capability::{ModelCapability, ReasoningControl, ReasoningEffort};
+pub use llm_engine::llm_client::capability::{ModelCapability, ReasoningControl, ReasoningEffort};
 
 /// Pod マニフェストの `[model]` セクション。
 ///