Show cron runs in service logs

[arjunkomath]

Summary

• include cron execution records in the service log query and viewer
• render, filter, search, copy, and download cron metadata alongside container logs
• preserve unique cron row identities and nullable cron result fields

Verification

• pnpm exec vitest run tests/victoria-logs.test.ts tests/log-routes.test.ts
• ./node_modules/.bin/tsc --noEmit
• pnpm exec oxfmt --check app/api/services/[id]/logs/route.ts components/logs/log-viewer.tsx lib/victoria-logs.ts tests/victoria-logs.test.ts

[github-actions]

React Doctor found no issues. 🎉

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 jobs:
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+        with:
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_{Reviewed by React Doctor for commit 1e39774.}