docs(spring-boot): modernize Couchbase configuration and enhance error handling

[teetangh]

• Updated Maven commands for building and running the application.
• Improved the CouchbaseConfig class with better error handling, connection timeout management, and enhanced logging.
• Revised application properties for Spring Boot 3.5+ compatibility, including new connection string formats and timeout settings.
• Added environment variable setup instructions for secure credential management.
• Enhanced integration test setup to ensure reliable execution and visibility into test results.
• Updated GitHub Actions workflow for multi-version testing and improved CI/CD reliability.

Files:

• tutorial/markdown/java/spring-boot/spring-boot.md
• tutorial/markdown/java/spring-data/spring-data.md

[gemini-code-assist]

Summary of Changes

Hello @teetangh, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on modernizing and enhancing the documentation for Spring Boot and Spring Data Couchbase quickstart examples. The changes aim to align the guides with current best practices for application configuration, error handling, testing, and continuous integration/continuous delivery (CI/CD), ultimately providing a more robust and user-friendly experience for developers working with Couchbase and Spring.

Highlights

• Couchbase Configuration Modernization: Updated Couchbase configuration for Spring Boot 3.5+, including new property names, connection string formats, and timeout settings, ensuring compatibility and improved resilience.
• Enhanced Error Handling and Logging: Improved the CouchbaseConfig class descriptions to reflect better error handling, graceful connection timeout management, and enhanced logging for easier troubleshooting.
• Secure Credential Management: Added clear documentation for setting up environment variables using .env files for secure credential management, promoting best practices.
• Robust Integration Testing: Significantly enhanced integration test setup and documentation for both Maven and Gradle projects, ensuring tests properly connect to Couchbase, validate real data, and provide clear execution visibility.
• Streamlined CI/CD with GitHub Actions: Detailed the modernized GitHub Actions workflows, which now support multi-version Java testing, manual triggering, improved reliability with timeouts, and automatic test report uploads.
• Updated Project Specifications: Revised project setup notes to accurately reflect current Spring Boot, Java, and key dependency versions, providing up-to-date context for developers.

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[deniswsrosa]

LGTM