v0.18.0

• Add on_receipt completion callbacks to command, script, save and custom operations, retaining completed responses after later logging, processing, budget or cancellation failures.
• Retain PTY channels after incomplete cleanup and retry cleanup before reopening or recovering a connection.
• Use owned Expect session scopes during SSH authentication so initialization cancellation releases terminal handles and cleanup failures preserve the authentication error.
• Use English diagnostics, CLI help and reports, and consume string-keyed progress documents from Runner 0.2.