chore(release): 版本升级到 0.2.0

自 0.1.0（项目初始化）以来的 73 个提交构成首个功能版本：
CAS V1、官方资源同步闭环（auto-discover/原子发布/断点续传/校验/
quarantine）、watch/daemon 常驻与控制面、Resource Backend RPC API
（envelope + BAT-ERR 错误码模型 + daemon/resource/catalog/task 命名
空间）、任务历史持久化与 .env 无参启动。

CHANGELOG：未发布内容整理为 [0.2.0] - 2026-07-17，补录 RPC API/
错误码/任务持久化/.env 条目与 7 月修复项；计划清单移至未发布节。

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

Cargo.lock

@@ -66,7 +66,7 @@ checksum = "2af50177e190e07a26ab74f8b1efbfe2ef87da2116221318cb1c2e82baf7de06"
 
 [[package]]
 name = "bat-adapters"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -83,7 +83,7 @@ dependencies = [
 
 [[package]]
 name = "bat-assetbundle"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "anyhow",
  "hex",
@@ -95,7 +95,7 @@ dependencies = [
 
 [[package]]
 name = "bat-cas-engine"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -112,7 +112,7 @@ dependencies = [
 
 [[package]]
 name = "bat-core"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -125,7 +125,7 @@ dependencies = [
 
 [[package]]
 name = "bat-ffi"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "bat-adapters",
  "bat-infrastructure",
@@ -136,7 +136,7 @@ dependencies = [
 
 [[package]]
 name = "bat-infrastructure"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -157,7 +157,7 @@ dependencies = [
 
 [[package]]
 name = "bat-patch"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "anyhow",
  "blake3",