feat(vscode): adding ability to update columns

[benfdking]

No description provided.

[Copilot]

Pull Request Overview

This PR adds the ability to update columns for external models in the VSCode extension through a new command. The feature allows users to click an "Update Columns" button in external model YAML files to automatically fetch and update column definitions from the database.

Key changes:

• Added a new LSP command EXTERNAL_MODEL_UPDATE_COLUMNS that updates external model columns
• Implemented code lenses to display "Update Columns" buttons in external model YAML files
• Refactored schema loading logic to extract a reusable get_columns function

Reviewed Changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
vscode/extension/tests/commands.spec.ts	New test file that validates the update columns functionality end-to-end
vscode/extension/package.json	Added DuckDB dependency for testing database operations
sqlmesh/lsp/reference.py	Refactored YAML model range finding and added function to get all model ranges
sqlmesh/lsp/main.py	Added command handler and code lens feature for external model column updates
sqlmesh/lsp/context.py	Implemented core logic for updating external model columns and generating code lenses
sqlmesh/lsp/commands.py	Defined the new command constant
sqlmesh/core/schema_loader.py	Extracted reusable get_columns function from existing code

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

Comments suppressed due to low confidence (1)

vscode/extension/package.json:137

• The version '1.3.2-alpha.25' appears to be an alpha version. Consider using a stable release version instead of an alpha version for production dependencies.

    "@duckdb/node-api": "1.3.2-alpha.25",

[georgesittas]

Looks ok, just a couple of comments.