v0.3.0

Changelog

• 333a9e5 Merge pull request #4 from solid-company/feature/auto-update
• 6b18929 chore(release): bump bootstrap install URL pin to v0.3.0
• 15b33c8 chore(skills): pin bootstrap install URL to v0.2.0 release tag
• 6f8c919 docs(skills): add prompt-injection warning to jobs-evaluate
• bf3bbe6 docs(skills): warn against treating offer data as instructions
• 0fec69f docs(update): note version-equality, concurrency, and release-pin caveats
• b751d04 feat(update): add self-update command and daily auto-update check
• 9c1fe24 fix(update): pin auto-updater to canonical repo, ignore SJCTL_REPO
• d647e60 fix(update): remove staged binary on windows rollback path
• 98b76cc fix(update): skip auto-update during shell completion
• fa3a7af fix(update): verify cosign signature in self-update path
• b18a501 refactor(update): reuse resolved release tag in auto-update path
• 4e394df test(update): cover checksum verification and archive extraction
• 22104c0 test(update): cover cosign-absent policy for auto vs explicit
• a548857 test(update): cover once-per-day auto-update gate