feat: Add Go SDK tests to GitHub Actions workflow

- Add Go test job following Python and TypeScript patterns
- Set up Go 1.24.4 environment
- Cache Go modules for faster builds
- Run all tests in sdks/community/go with verbose output

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: mattsp1290

.github/workflows/test.yml

@@ -89,4 +89,35 @@ jobs:
 
     - name: Run tests
       working-directory: typescript-sdk
-      run: pnpm run test
+      run: pnpm run test
+
+  go:
+    name: Go SDK Tests
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: '1.24.4'
+
+    - name: Setup Go module cache
+      uses: actions/cache@v4
+      with:
+        path: |
+          ~/go/pkg/mod
+          ~/.cache/go-build
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-go-
+
+    - name: Download dependencies
+      working-directory: sdks/community/go
+      run: go mod download
+
+    - name: Run tests
+      working-directory: sdks/community/go
+      run: go test ./... -v