Streamlined Keycloak configurations with defaults for development and production in `.env`. Added health checks and improved environment variable documentation with comments to differentiate local and server deployments. Ensured compatibility with pre-built registry images.
- Updated Gradle version in `.env`, Dockerfiles, and wrapper to 9.3.1.
- Replaced alias-based application of `kotlinMultiplatform` plugin with direct `id` usage in subprojects to resolve "Plugin loaded multiple times" error.
- Applied centralized plugin management and Gradle daemon optimizations to improve Docker build stability and address KMP classloading issues.
Eliminated `browser {}` blocks from core library modules to resolve "Plugin loaded multiple times" error in Kotlin/JS Gradle builds. Adjusted to support a cleaner, centralized JS target configuration. Documented the root cause and workaround in troubleshooting logs.
