feat: add Maven compilation CI workflow for streaming branch

- Add GitHub Actions workflow to automatically compile Maven project
- Workflow triggers on push/PR to streaming branch only
- Includes JDK 11 setup and Maven dependency caching for faster builds
- Add build status badge to README for visibility

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

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

Author: bindiego

.github/workflows/maven-compile.yml

@@ -0,0 +1,30 @@
+name: Maven Compile
+
+on:
+  push:
+    branches: [ streaming ]
+  pull_request:
+    branches: [ streaming ]
+
+jobs:
+  compile:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Set up JDK 11
+      uses: actions/setup-java@v4
+      with:
+        java-version: '11'
+        distribution: 'temurin'
+        
+    - name: Cache Maven packages
+      uses: actions/cache@v4
+      with:
+        path: ~/.m2
+        key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+        restore-keys: ${{ runner.os }}-m2
+        
+    - name: Compile with Maven
+      run: mvn clean compile

readme.md

@@ -1,5 +1,7 @@
 ## A Comprehensive Data Platform on GCP
 
+[![Maven Compile](https://github.com/cloudymoma/raycom/actions/workflows/maven-compile.yml/badge.svg?branch=streaming)](https://github.com/cloudymoma/raycom/actions/workflows/maven-compile.yml)
+
 You can use this master branch as a skeleton beam project
 
 master分支可以用来当作一个骨架项目