Wrap the sandbox import in try/except so subpackages like
openshell.prover can be imported without a full Rust build.
Removes the conftest.py namespace hack that was working around this.
Signed-off-by: Alexander Watson <zredlined@gmail.com>
Closes#273
Verify inference endpoints synchronously on the server during set/update, expose a --no-verify escape hatch in the CLI and Python helper, and return actionable failures when validation does not pass.