feat: Add Croissant JSON-LD metadata to provenance pages

[d-a-k-s-h-7]

This feature dynamically generates and injects Croissant dataset metadata (JSON-LD format) into the Knowledge Graph Browser for provenance nodes (dc/base/*).

• Queries the Mixer V2 Node API to retrieve dataset properties like name, description, license, and creator source.
• Injects the JSON-LD script into the node.html template for SEO and metadata crawlers.

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Summary of Changes

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This pull request enhances the Knowledge Graph Browser by adding support for Croissant JSON-LD metadata. By dynamically querying dataset properties for provenance nodes and injecting them into the page template, the changes ensure that metadata crawlers can better index and understand the datasets presented in the browser.

Highlights

• Croissant Metadata Injection: Implemented dynamic generation and injection of Croissant JSON-LD metadata for provenance nodes (dc/base/*) to improve SEO and discoverability.
• Data Retrieval: Integrated calls to the Mixer V2 Node API to fetch essential dataset properties including name, description, license, and creator information.
• Template Updates: Updated the node.html template to include the generated JSON-LD script block within the document head.

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