v0.21.0 - PostgreSQL 17, Configurable Schema, Integration Tests

Release 0.21.0: Phase 2.3 Complete

🚀 Major Changes

• Upgraded to PostgreSQL 17 (from PostgreSQL 16)
• Configurable schema support via POSTGRES_SCHEMA environment variable
• Comprehensive integration tests - 6 new PostgreSQL CRUD tests
• CI integration tests - All tests now run in CI with Docker databases
• Local test scripts - Easy test-local.sh/test-local.bat for local testing

✨ Test Infrastructure

• ✅ All 146 tests pass in CI (120+ unit tests + 26 integration tests)
• 🐳 Docker Compose setup for local PostgreSQL/MySQL testing
• 📚 Comprehensive test documentation in TESTING.md
• 🔧 Automatic environment variable configuration

⚙️ Configuration

• Default Port: 5440 (configurable via POSTGRES_PORT)
• Default Version: PostgreSQL 17 (configurable via POSTGRES_VERSION)
• Schema: Configurable via POSTGRES_SCHEMA (defaults to "test")
• Gradle automatically passes environment variables to test JVM

📖 Documentation

• Added comprehensive TESTING.md guide
• Updated CLAUDE.md with test script usage
• CI troubleshooting and schema configuration docs

🔧 JitPack Usage

repositories {
    maven { url 'https://jitpack.io' }
}

dependencies {
    implementation 'com.github.mayhew3:Postgres-Object:0.21.0'
}

🐛 Bug Fixes

• Fixed CI schema mismatch issues
• Corrected PostgreSQLCRUDIntegrationTest table names
• Fixed ResultSet positioning bugs in integration tests
• Fixed null handling test expectations

All tests passing in CI: https://github.com/mayhew3/Postgres-Object/actions