fix: deploy detection — use fetch-depth:2 for git diff

[nirokato]

The discover job's git diff failed because actions/checkout defaults to depth 1. The before SHA isn't in the shallow history. Use fetch-depth: 2 and diff against HEAD~1 instead.

[github-actions]

OpenTofu Plan

Plan output

data.cloudflare_zone.zone: Reading...
cloudflare_pages_project.project["weft"]: Refreshing state... [id=andy-apps-weft]
cloudflare_pages_project.project["homepage"]: Refreshing state... [id=andy-apps-homepage]
cloudflare_pages_project.project["peer-drop"]: Refreshing state... [id=andy-apps-peer-drop]
cloudflare_pages_project.preview: Refreshing state... [id=andy-apps-preview]
cloudflare_pages_project.project["clock"]: Refreshing state... [id=andy-apps-clock]
data.cloudflare_zone.zone: Read complete after 0s [id=a7f7a62f2c2b914baa9b82b9e41a29c5]
cloudflare_pages_domain.domain["homepage"]: Refreshing state... [id=2c55d7af-683f-4463-aa98-5bc7b1e707cd]
cloudflare_pages_domain.domain["peer-drop"]: Refreshing state... [id=69db182b-cd41-43ba-8c0c-bcfc92d974e9]
cloudflare_pages_domain.domain["clock"]: Refreshing state... [id=74b72e0f-818d-420e-859a-f0437bd35828]
cloudflare_pages_domain.domain["weft"]: Refreshing state... [id=df0069d6-a9c4-411d-b52b-88227318b108]
cloudflare_record.cname["peer-drop"]: Refreshing state... [id=569777844ae8c626fc232d14b0837470]
cloudflare_record.cname["clock"]: Refreshing state... [id=d0e16b835decb7bb06f5feb0736801e3]
cloudflare_record.cname["weft"]: Refreshing state... [id=e2411dbb4de2318f0f00d1d47b584e4d]
cloudflare_record.cname["homepage"]: Refreshing state... [id=c2155ce7863f7e7689dc3f05367746e2]

No changes. Your infrastructure matches the configuration.

OpenTofu has compared your real infrastructure against your configuration and
found no differences, so no changes are needed.