Verify email from browser link click

Browser-oriented link verification flow.

This endpoint is intended for users clicking verification links in email. It validates the token on the backend and redirects the browser to the stored, validated redirectTo URL with the verification result.

Redirect query params:

• Success: insforge_status=success&insforge_type=verify_email
• Error: insforge_status=error&insforge_type=verify_email&insforge_error=...
• insforge_status: success or error
• insforge_type: always verify_email
• insforge_error: present only on error, human-readable message

Recommended handling: use your sign-in page as redirectTo. When the redirect arrives with insforge_status=success, show a confirmation message and ask the user to sign in with their email and password.