fix(vscode): allow uv pip executable called through tcloud

[benfdking]

• sets up environment where tcloud is called so can run uv

• manual test
• e2e tests

[benfdking]

https://github.com/TobikoData/sqlmesh-enterprise/issues/2894

[Copilot]

Pull Request Overview

This PR enhances the getTcloudBin utility to return structured execution info (including env, workspace path, and args) instead of just a path, and updates all downstream execAsync calls to use the new SqlmeshExecInfo.

• Changed getTcloudBin return type and injected Python environment variables
• Updated all execAsync invocations to pass bin and env from the new exec info
• Refactored SQLMesh and LSP commands to use the unified execution format

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
vscode/extension/src/utilities/sqlmesh/sqlmesh.ts	Updated getTcloudBin return type, built env, and adjusted all calls to use bin and env
vscode/extension/src/auth/auth.ts	Switched execAsync calls to use tcloudBin.value.bin and env

Comments suppressed due to low confidence (2)

vscode/extension/src/utilities/sqlmesh/sqlmesh.ts:56

• [nitpick] The JSDoc comment still refers to returning a string path. Please update it to describe the new SqlmeshExecInfo (including bin, workspacePath, env, and args).

 * @returns The tcloud executable for the current Python environment.

vscode/extension/src/utilities/sqlmesh/sqlmesh.ts:72

• [nitpick] The new error branch for getPythonEnvVariables isn’t covered by existing tests—consider adding a unit test to verify that a failure in env variable resolution returns the expected error.

  if (isErr(envVariables)) {