Keep accepted XiaoYunque tasks alive through query timeouts

[smackgg]

What changed

• treat bounded status-query timeouts as non-terminal observations after XiaoYunque has accepted a task
• continue polling the same persisted task identity until success, a canonical terminal failure, or caller cancellation
• bump the XiaoYunque Plugin to 0.4.1 and its companion to 0.3.5
• add a regression test covering more than three consecutive query timeouts without resubmission

Why

Repeated status request timeouts were counted as generic observation failures. After three failures the companion terminalized an already accepted vendor task even though the task could still complete successfully.

Impact

Accepted image and video jobs are no longer abandoned because several individual status requests time out, and billable submissions are never repeated.

Validation

• 119 companion tests
• companion typecheck and compiled build
• Plugin validation
• Plugin pack: plugin-xiaoyunque-generation-v0.4.1