docs(jdbc): release 3.8.1 and update demo

[sheyanjie-qq]

Description

Issue(s)

• Close/close/Fix/fix/Resolve/resolve: Issue Link

Checklist

Please check the items in the checklist if applicable.

• Is the user manual updated?
• Are the test cases passed and automated?
• Is there no significant decrease in test coverage?

[gemini-code-assist]

Summary of Changes

Hello @sheyanjie-qq, 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 the release of version 3.8.1 of the TDengine JDBC driver, which primarily introduces enhanced capabilities for handling Decimal and Blob data types through parameter binding. The changes ensure that all relevant documentation and example projects are updated to use this new driver version and correctly reflect the newly supported data type operations. This update improves the driver's functionality and keeps the accompanying resources current.

Highlights

• JDBC Driver Version Update: The TDengine JDBC driver has been updated to version 3.8.1 across all relevant documentation and example projects, ensuring consistency and access to the latest features.
• Enhanced Data Type Support: The JDBC driver now supports writing Decimal and Blob data types via parameter binding, improving flexibility for data insertion.
• Documentation Updates: Both English and Chinese documentation have been revised to reflect the new 3.8.1 release and detail the added support for Decimal and Blob types.
• Parameter Binding Example: The WSParameterBindingFullDemo.java example has been extended to include practical demonstrations of parameter binding for the newly supported BLOB and DECIMAL data types.
• Git Ignore Update: A new file, CLAUDE.md, has been added to the .gitignore file, likely for internal development or testing purposes.

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[gemini-code-assist]

Code Review

This pull request releases version 3.8.1 of the JDBC driver. It includes version bumps in various pom.xml files and documentation, adds release notes for the new version, and updates the JDBC demo to showcase new support for BLOB and DECIMAL types. The changes are generally well-executed and align with the release. I have one suggestion to improve the wording in the Chinese documentation for better clarity.