Add Polaris Sync tool to polaris-tools

.github/renovate.json5

@@ -0,0 +1,42 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  extends: ["config:base"],
+
+  "labels": ["dependencies"],
+
+  packageRules: [
+    // Check for updates, merge automatically
+    {
+      matchManagers: ["maven", "gradle", "gradle-wrapper"],
+      matchUpdateTypes: ["minor", "patch"],
+      automerge: true,
+      platformAutomerge: true,
+    },
+
+    // Special rule for Iceberg and related artifacts
+    {
+      matchManagers: ["maven", "gradle"],
+      matchUpdateTypes: ["minor", "patch"],
+      matchPackagePatterns: [
+        "^org[.]apache[.]hadoop:hadoop-aws$",
+        "^org[.]apache[.]hadoop:hadoop-common$",
+        "^org[.]apache[.]hive:.*$",
+        "^org[.]apache[.]iceberg:.*",
+        "^software[.]amazon[.]awssdk:.*",
+      ],
+      automerge: false,
+      prBodyNotes: [":warning: Only update org.apache.iceberg with org.apache.hadoop + software.amazon.awssdk:warning:"]
+    },
+
+    // Check for major updates, but do not merge automatically
+    {
+      matchManagers: ["maven", "gradle", "gradle-wrapper"],
+      matchUpdateTypes: ["major"],
+      automerge: false,
+    },
+  ],
+
+  // Max 50 PRs in total, 10 per hour
+  prConcurrentLimit: 50,
+  prHourlyLimit: 10,
+}

.github/workflows/main.yml

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+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+
+jobs:
+  java:
+    name: Java/Gradle
+    runs-on: ubuntu-24.04
+    strategy:
+      max-parallel: 4
+      matrix:
+        java-version: [21, 23]
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: 'true'
+
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: |
+            21
+            ${{ matrix.java-version != '21' && matrix.java-version || '' }}
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+
+      - name: Build & Check
+        run: ./gradlew --rerun-tasks assemble ${{ env.ADDITIONAL_GRADLE_OPTS }} check publishToMavenLocal
+
+      - name: Capture test results
+        uses: actions/upload-artifact@v4
+        if: failure()
+        with:
+          name: test-results
+          path: |
+            **/build/reports/*
+            **/build/test-results/*

.gitignore

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+
+### Java ###
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+#misc
+target/
+dependency-reduced-pom.xml
+*.patch
+*.DS_Store
+.DS_Store
+
+#intellij
+*.iml
+.idea
+*.ipr
+*.iws
+
+# vscode
+.vscode
+
+# node
+node_modules/
+ui/src/generated/
+
+# Eclipse IDE
+.classpath
+.factorypath
+.project
+.settings
+.checkstyle
+out/
+
+# gradle
+.gradle/
+build/
+gradle/wrapper/gradle-wrapper.jar
+version.txt
+
+# Python venv
+venv/
+
+# Maven flatten plugin
+.flattened-pom.xml
+
+# Site
+site/site
+
+# Ignore Gradle project-specific cache directory
+.gradle
+
+# Ignore Gradle build output directory
+build

LICENSE

@@ -0,0 +1,215 @@
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+--------------------------------------------------------------------------------
+
+This product includes a gradle wrapper.
+
+* gradlew
+* gradle/wrapper/gradle-wrapper.properties
+
+Copyright: 2010-2019 Gradle Authors.
+Home page: https://github.com/gradle/gradle
+License: https://www.apache.org/licenses/LICENSE-2.0
+
+--------------------------------------------------------------------------------