Upgrade Java target from 11 to 17

- Update sourceCompatibility and targetCompatibility to '17' in build.gradle
- Update CI workflow to use JDK 17 (actions/setup-java@v4)
- Update actions/checkout@v2 to v4
- Update actions/cache@v2 to v4
- Verified: no reflective access, removed APIs, or Java 17 incompatibilities in source code
- All 68 tests pass with JDK 17

Author: devin-ai-integration[bot]

.github/workflows/gradle.yml

@@ -0,0 +1,34 @@
+name: Java CI
+
+on:
+  push:
+    branches:
+      - '**'
+    tags:
+      - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
+  pull_request:
+    branches:
+      - '**'
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up JDK 17
+      uses: actions/setup-java@v4
+      with:
+        distribution: zulu
+        java-version: '17'
+    - uses: actions/cache@v4
+      with:
+        path: |
+          ~/.gradle/caches
+          ~/.gradle/wrapper
+        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
+        restore-keys: |
+          ${{ runner.os }}-gradle-
+    - name: Test with Gradle
+      run: ./gradlew clean test

build.gradle

@@ -7,8 +7,8 @@ plugins {
 }
 
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '11'
-targetCompatibility = '11'
+sourceCompatibility = '17'
+targetCompatibility = '17'
 
 spotless {
     java {