chore(deps): 移除占位 crate 中零引用的依赖

bat-patch 的 bsdiff/json-patch、bat-assetbundle 的 byteorder/lz4/lzma-rs 在
源码中完全未使用，占位阶段白增编译负担。移除并留注释说明待对应引擎/解析器真正
实现时再按需引入。

对应 issue #18 维护清单 3-6。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Cargo.lock

@@ -86,10 +86,7 @@ name = "bat-assetbundle"
 version = "0.1.0"
 dependencies = [
  "anyhow",
- "byteorder",
  "hex",
- "lz4",
- "lzma-rs",
  "serde",
  "serde_json",
  "thiserror",
@@ -164,8 +161,6 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "blake3",
- "bsdiff",
- "json-patch",
  "serde",
  "serde_json",
  "tempfile",
@@ -204,12 +199,6 @@ dependencies = [
  "generic-array",
 ]
 
-[[package]]
-name = "bsdiff"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6709158fe6ca66c1f32eb27b4ae5997c67b0df350ae185831233af3e7a91213"
-
 [[package]]
 name = "byteorder"
 version = "1.5.0"
@@ -729,28 +718,6 @@ version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"
 
-[[package]]
-name = "json-patch"
-version = "4.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7421438de105a0827e44fadd05377727847d717c80ce29a229f85fd04c427b72"
-dependencies = [
- "jsonptr",
- "serde",
- "serde_json",
- "thiserror",
-]
-
-[[package]]
-name = "jsonptr"
-version = "0.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5a3cc660ba5d72bce0b3bb295bf20847ccbb40fd423f3f05b61273672e561fe"
-dependencies = [
- "serde",
- "serde_json",
-]
-
 [[package]]
 name = "lazy_static"
 version = "1.5.0"

crates/bat-assetbundle/Cargo.toml

@@ -12,11 +12,8 @@ serde.workspace = true
 serde_json.workspace = true
 tracing.workspace = true
 
-# Unity AssetBundle 解析需要的依赖
+# 注意：byteorder、lz4、lzma-rs 等 UnityFS 解析/解压依赖待解析器真正实现时
-byteorder = "1.5"
+# 再按需引入，避免占位阶段白增编译负担。
-lz4 = "1.28"
-# LZMA 解压缩
-lzma-rs = "0.3"
 
 [dev-dependencies]
 hex = "0.4"

crates/bat-patch/Cargo.toml

@@ -12,11 +12,8 @@ serde.workspace = true
 serde_json.workspace = true
 blake3.workspace = true
 
-# Binary diff/patch
+# 注意：bsdiff（binary diff/patch）与 json-patch（RFC 6902）等具体算法依赖
-bsdiff = "0.2"
+# 待 Patch 引擎真正实现时再按需引入，避免占位阶段白增编译负担。
-
-# JSON patch
-json-patch = "4.2"
 
 [dev-dependencies]
 tempfile = "3.14"