Add validation to ensure endIndex > startIndex for robust parsing

Co-authored-by: dmichon-msft <26827560+dmichon-msft@users.noreply.github.com>

Author: Copilot

vscode-extensions/debug-certificate-manager-vscode-extension/src/extension.ts

@@ -216,7 +216,7 @@ export function activate(context: vscode.ExtensionContext): void {
 
           const startIndex: number = output.lastIndexOf(markerPrefix);
           const endIndex: number = output.lastIndexOf(markerSuffix);
-          if (startIndex !== -1 && endIndex !== -1) {
+          if (startIndex !== -1 && endIndex !== -1 && endIndex > startIndex) {
             homeDir = output.substring(startIndex + markerPrefix.length, endIndex).trim();
           } else {
             throw new Error('Failed to parse home directory from command output');