Add support for passing header X-Trino-Client-Tags

[laserninja]

Add support for X-Trino-Client-Tags header

Description

This PR adds support for the X-Trino-Client-Tags header in the Grafana Trino datasource plugin. The X-Trino-Client-Tags header is part of the official Trino client protocol and allows sending a comma-separated list of tag strings to identify Trino resource groups, which is useful for resource management and query monitoring.

How to Use

1. Navigate to the Trino datasource configuration page in Grafana
2. In the "Trino" section, find the "Client tags" field
3. Enter a comma-separated list of tags (e.g., grafana,dashboard,analytics)
4. Save the configuration

The tags will be automatically sent with every query to help Trino administrators identify and manage resource usage from different client sources.

Technical Details

• The X-Trino-Client-Tags header is only sent when client tags are configured (optional field)
• Tags are stored as a comma-separated string in the datasource configuration
• No breaking changes - existing configurations will continue to work unchanged

Testing

• Go backend builds successfully
• Frontend TypeScript compiles without errors
• All existing functionality remains intact
• New feature is optional and doesn't affect existing setups

References

• Trino Client Protocol Documentation
• Trino Resource Groups Documentation

[cla-bot]

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