Switch plop.so apex template from A records to CNAME

[ccarse]

Description

Updates the plop.so.website-apex template to use a CNAME record at apex instead of hardcoded A record IPs. The previous A record IPs (104.21.9.9, 172.67.140.209) are Cloudflare shared proxy IPs that caused Error 1000 for domains also on Cloudflare.

Uses CNAME with `host: "@"` and `hostRequired: true` — Cloudflare applies CNAME flattening at the zone apex automatically and ignores the hostRequired flag. This follows the same pattern as PR #905 (spinlab.studio), which was confirmed by the Cloudflare Domain Connect team.

Changes:

• Record type: 2x A records -> CNAME pointing to plop.so
• Set hostRequired: true (required by spec for CNAME with host "@")
• Version bumped to 2

Type of change

• New template
• Bug fix (non-breaking change which fixes an issue in the template)
• New feature (non-breaking change which adds functionality to the template)
• Breaking change (fix or feature that would cause existing template behavior to be not backward compatible)

How Has This Been Tested?

• Template functionality checked using Online Editor
• Template filename follows `..json` pattern
• Resource URL with `logoUrl` is served by webserver

Checklist of common problems

• `syncPubKeyDomain` is set in every template
• `warnPhishing` is not used alongside `syncPubKeyDomain`
• `syncRedirectDomain` not needed (no redirect_uri)
• No SPF content in TXT records
• `txtConflictMatchingMode` not needed (no TXT records)
• No bare variables as full record values
• No bare variables as full host labels
• No variables creating subdomains in host field
• `%host%` not used in host attributes
• `essential` not needed (non-modifiable records)

Online Editor test results

plop.so.website-apex subdomain test (hostRequired=true):
https://domainconnect.paulonet.eu/dc/free/templateedit?token=H4sIAOIKy2kC%2F91SYW%2FTMBD9K5E%2FgWhKljRtEwmJbgOBEB2MMYSqKro4l86Q2MZ22oaq%2Fx27bWg7ED%2BAT8ndvXt%2B7%2B42xGAtKzBI0g2RSixZgeptQVIiKyH7WpDe7%2FQUajwUbFajWjKKO%2BwKc80M%2BiBxfSyd4L3XrELvjdCG8YX3ZGJxTy1wiUozwUka2n9QDPIKr1FTxaTZ5cmV4Byp8VrRKM%2FRe4WogXHPCO%2Bg0CuF8krH%2F7DndwpaTi8rQb%2BTtIRKo808gMLiGFrAhyZ%2Fh%2B31ju%2FMsOO5xR8N23UY1dgGhVSoQpN0tiGmlc7Y1XTy%2FtUBbsOXblSCcaPvxBmdMRVJo2EQbOfbHvkpOGZHtnmPFJ0CXINdBvapqI%2B0zpm24UKJRmasa5KgoNZua1377Kx%2F3hHMDgzubbbgQmGm7RdMo7AzVzeVYRms4JgqaAZSVq2Vqm3V8vxpnO8X3CkswMDfjfdIVlCnlblrCcskGcYx9WEMQ38QFrmfQ5D4%2BYiOyjK4CBPAk7N7dI3%2FuLtHE0OtkRsGVgSZVCtoNdlu5z07vf%2FEit2xhiUWGThsGIRDP4j8KLgLo3QwSKNBP45GyTh5FgRpEDgXqM3e2sZew%2BkdELH%2B9nEd3yw0XEwmXy5XZnz%2F9SaGaby%2BlWX4CT%2BH92paPU%2BSweIF2f4CJMAxTjgEAAA%3D

Note: Apex test (no host) is not applicable since hostRequired=true. Cloudflare ignores this flag and applies CNAME flattening at apex regardless — confirmed by Cloudflare Domain Connect team in PR #905.

[github-actions]

✅ JSON Filename Check Passed

[github-actions]

✅ JSON Schema Validation Passed

[github-actions]

Linter OK

plop.so.website-apex.json

Level	Code	Note

[github-actions]

PR Description Check Passed

All required sections are filled in correctly.

Details

  OK  Type of change: 1/4 checkboxes ticked
  OK  How Has This Been Tested?: all 3 checkboxes ticked
  OK  Checklist of common problems: 10/10 checkboxes ticked
  OK  Online Editor test results: 1 link(s) found
  OK  Template coverage: all 1 template(s) covered
Labels to remove: Checklist of common problems not complete, Forged editor links, PR description incomplete, Test links missing

PR description check PASSED