ci: offset train cron and dependabot time off :00 for host stagger

[vreshch]

Summary

• Scheduling rule change: no cron at minute :00, and same-host deploys staggered 10 min apart (vreshch.com shares the host with crystallography.io + diffractwd.com).
• train.yml cron: 0 21 * * 5 -> 17 21 * * 5.
• dependabot.yml time for all 3 ecosystems (npm, docker, github-actions): 18:00 -> 16:07.

Test plan

• YAML syntax valid (yaml.safe_load)
• npx @action-validator/cli clean on train.yml
• npm run format:check / prettier clean
• CI green on this PR (pr-validation.yml)

[github-actions]

🎉 PR Validation ✅ PASSED

Commit: 6569bc4464d13219ee7e23c04a3d40ead03a8fb1
Branch: chore/train-cron-offset

Checks:

• ✅ Dependencies installed
• ✅ Linting passed
• ✅ Format check passed
• ✅ Build successful
• ✅ Docker build
• ✅ E2E tests

Visual Changes: 8 of 8 screenshots changed

📸 contacts desktop — 100% changed

📸 contacts mobile — 100% changed

📸 home desktop — 100% changed

📸 home mobile — 100% changed

📸 interests desktop — 100% changed

📸 interests mobile — 100% changed

📸 projects desktop — 100% changed

📸 projects mobile — 100% changed

Ready to merge! ✨

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⏰ Generated at: 2026-08-10T21:15:14.299Z