Fix deletion of stopped stateful services

[arjunkomath]

Summary

• allow stopped stateful services to create deletion backups from their locked server
• preserve reuse of completed backups when every volume is covered
• update deletion confirmation copy for stopped services

Verification

• npx biome check --write actions/projects.ts lib/inngest/functions/service-deletion-workflow.ts 'app/(dashboard)/dashboard/projects/[slug]/[env]/services/[serviceId]/configuration/page.tsx'
• ./node_modules/.bin/tsc --noEmit
• Vitest: 62 files, 426 tests passed
• git diff --check

Bug

https://app.basecamp.com/5890597/buckets/47439993/todos/10163020201

[github-actions]

React Doctor found no issues. 🎉

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_{Reviewed by React Doctor for commit b5f4d2f.}