Fix temp directory leak in Azure fork deploy

[ewega]

Problem

findRepoRoot() in cmd/deploy_azure.go:377 creates a temporary directory with os.MkdirTemp, clones a DevLake repo into it, and returns the path. However, the caller (runDeployAzure) never removes the temporary directory after use.

go func findRepoRoot() (string, error) { if azureRepoURL != "" { tmpDir, err := os.MkdirTemp("", "devlake-clone-*") // ... return tmpDir, nil // caller never cleans up tmpDir } }

By contrast, deployLocalFork_clone in deploy_local.go:304-309 correctly uses defer os.RemoveAll(tmpDir).

Each Azure fork deploy leaks ~100MB+ of cloned source code in the system temp directory.

Fix

Either:

1. Return a cleanup function alongside the path: func findRepoRoot() (string, func(), error)
2. Or have runDeployAzure defer cleanup after calling findRepoRoot

Acceptance Criteria

• Temp directory is removed after Azure fork deploy completes (success or failure)
• Existing local fork deploy still works (deploy_local.go already handles this correctly)
• go build ./... and go test ./... pass

[ewega]

Agent context: The fix pattern already exists in cmd/deploy_local.go:304-309 which uses defer os.RemoveAll(tmpDir). Apply the same pattern to cmd/deploy_azure.go. Either return a cleanup function from findRepoRoot() or have runDeployAzure defer cleanup after calling it. Option 2 (defer in caller) is simpler. Build with go build ./... and test with go test ./....