```

feat(base): 添加邮箱注册码功能及用户注册接口

- 在 `sessionManager` 中新增邮件注册码缓存管理实例和相关方法
- 实现生成、保存、验证、删除邮件注册码的逻辑
- 新增 `/reg` 和 `/email` 接口用于用户注册和发送验证码
- 引入 `golang-lru` 依赖以支持限流缓存功能
- 调整包导入顺序，优化代码结构
```

common/utils/golang-lru-main/.github/workflows/ci.yml

@@ -0,0 +1,52 @@
+name: build
+
+on:
+  push:
+    branches: [main]
+    tags: ["*"]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: set up go 1.19
+        uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
+        with:
+          go-version: 1.19
+        id: go
+
+      - name: checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: build, test and generate coverage report
+        run: |
+          go test -timeout=60s -race -v ./... -coverprofile=coverage.out
+          go build -race ./...
+
+      - name: build and test ARC
+        working-directory: ./arc
+        run: |
+          go test -timeout=60s -race
+          go build -race
+
+      - name: Upload the coverage report
+        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        with:
+         path: coverage.out
+         name: Coverage-report
+
+      - name: Display the coverage report
+        run: go tool cover -func=coverage.out
+
+      - name: install golangci-lint
+        run: curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s -- -b $GITHUB_WORKSPACE v1.53.3
+
+      - name: run golangci-lint
+        run: $GITHUB_WORKSPACE/golangci-lint run --out-format=github-actions ./... ./simplelru/... ./expirable/...
+
+      - name: run golangci-lint on ARC
+        working-directory: ./arc
+        run: $GITHUB_WORKSPACE/golangci-lint run --out-format=github-actions ./...

common/utils/golang-lru-main/.github/workflows/two-step-pr-approval.yml

@@ -0,0 +1,20 @@
+name: Two-Stage PR Review Process
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, labeled, unlabeled, ready_for_review, converted_to_draft]
+  pull_request_review:
+    types: [submitted]
+
+jobs:
+  manage-pr-status:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+      contents: write
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4.0.0
+      
+      - name: Two stage PR review
+        uses: hashicorp/two-stage-pr-approval@v0.1.0