0.3.1

Reliability and security hardening from a cross-repo code review. No changes to the capture flow.

• Clip requests to vault-autopilot now time out after 30 seconds instead of hanging forever when the server stalls; you get the usual "check that Obsidian is open" notice.
• Unexpected capture failures in the background worker are logged instead of vanishing as silent unhandled rejections.
• Notion uploads name files by their actual image type (clip.jpg for JPEG video frames, clip.png for screenshots).

Pairs with vault-autopilot 0.4.1.