A lifecycle lab with expected failures

Build a small application and a set of isolated lifecycle experiments. Explain which errors the SDK detects and what your application does next.

Show a normal create/start/request/stop sequence.
Test empty id and empty name independently.
Test request-before-start and double-start independently.
Explain the difference between an error handler that returns and one that continues.
Record source, output, and the limitations of sandbox capability checks for review.