ci: Add GitHub Actions workflow for unit and integration tests (#6)

Assisted-by: Claude Code (Opus 4.6)

Signed-off-by: Xiaofeng Wang <henrywangxf@me.com>

Author: henrywang

.github/workflows/ci.yml

@@ -0,0 +1,40 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  unit-tests:
+    name: Unit Tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: stable
+      - name: Build
+        run: go build ./...
+      - name: Vet
+        run: go vet ./...
+      - name: Unit tests
+        run: go test -v -race ./...
+
+  integration-tests:
+    name: Integration Tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: stable
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Build Rust test server
+        run: cargo build --manifest-path tests-integration/Cargo.toml
+      - name: Run integration tests
+        run: go test -v ./tests-integration/...