chore(main): release 3.0.3

[kitchen-porter]

🤖 I have created a release beep boop

3.0.3 (2026-08-23)

Bug Fixes

• accept a disk name with no configuration under it (#164) (88e029b)
• clear the state file when the instance is already gone (#159) (518a122)
• downcase instance names instead of mangling them (#163) (4d56617)
• fail instead of silently creating a blank disk from a missing image (#161) (3ad2602)
• leave room for the disk name when generating an instance name (#162) (d91c792)
• remove the duplicated instance-name helpers (#168) (a9dcaf2)
• report an unresolvable image family in the driver's own terms (#165) (5d96551)
• stop sending duplicate metadata keys to GCE (#158) (a145063)

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[kitchen-porter]

🤖 Created releases:

• v3.0.3

🌻