Serverless Postgres, External Connections, & MCP

This release adds:

• Lakebase (Serverless PostgreSQL) UI – Low-latency data serving.
• Unity Catalog‑governed connections – Identity‑driven external API calls, no hard‑coded credentials.
• Model Context Protocol (MCP) integrations – Managing AI data assets across platforms for agentic workflows.

What's Changed

• Add Streamlit app to query Databricks Lakehouse OLTP tables by @antonbricks in #19, #20
• Added Dash external connections with UC connections by @vivian-xie-db in #24
• Streamlit UC connections by @antonbricks in #23
• OLTP for Dash by @vivian-xie-db in #34
• • Fix: Update code snippets for invoking model in Streamlit and Genie room embedding by @ImaneTS in #22

Full Changelog: v2.3.0...v2.4.0