0.9.1

Changelog:

Fixes:

• TestContextUtil.withTestContext is public again. The 0.9.0 freeze made TestContextUtil and TestContextRunner internal, breaking test projects that use withTestContext as the setup bridge predating SetupStep. Both are restored as public, gated behind @KensaInternalApi (opt-in error) and deprecated in favour of SetupStep. Existing consumers opt in with @file:OptIn(dev.kensa.KensaInternalApi::class) or -opt-in=dev.kensa.KensaInternalApi in the build (#208).