* fix: gracefully handle unsupported thread/name/set on older Codex CLI
Codex CLI v0.118.0 does not recognize the thread/name/set JSON-RPC method,
causing startThread() to throw. Thread naming is cosmetic (for job log
labels) and should not block thread creation. Wraps the call in try/catch
so it fails silently on older CLI versions.
Fixes#119
* refactor: only suppress unsupported-method errors for thread/name/set
Address Codex review feedback: the bare catch swallowed all errors
including auth, network, and server failures. Now only suppresses
errors containing 'unknown variant' or 'unknown method' (the specific
error older CLI versions return) and rethrows everything else.
