Add crossly.net.storefront-subdomain template

[alphajew420]

Description

Adds a new template crossly.net.storefront-subdomain so Crossly sellers can attach a custom subdomain (shop.theirbrand.com) to their native storefront in one click instead of pasting a CNAME by hand.

Crossly is a multi-marketplace crossposting SaaS for resellers, with a native Crossly storefront feature; this template covers the subdomain-only flow (hostRequired: true). A future PR may add an apex flavor once we have the ALIAS / ANAME story sorted.

Live, verifiable template URL (identical content to the file in this PR):
https://crossly.net/api/public/domain-connect/templates/crossly.net/storefront-subdomain.json

Signing key published as TXT _dck1.crossly.net (p=1,a=RS256,d=<spki-der-base64>).

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?

Please mark the following checks done

• Template functionality checked using Online Editor
• Template file name follows the pattern <providerId>.<serviceId>.json
• resource URL provided with logoUrl is actually served by a webserver

Note: I will paste the Online Editor test-results Markdown link as a follow-up comment shortly. Flagging now so review can begin in parallel with the test artifact upload.

Checklist of common problems

• syncPubKeyDomain is set — set to crossly.net, with the public key published as TXT _dck1.crossly.net (p=1,a=RS256,d=...)
• warnPhishing is not set alongside syncPubKeyDomain — omitted intentionally
• syncRedirectDomain is set whenever the template uses redirect_uri in the synchronous flow — crossly.net,www.crossly.net
• no TXT record contains SPF content — N/A, only a single namespaced verification TXT
• txtConflictMatchingMode is set on every TXT record that must be unique per label or content prefix — N/A, the _crossly-verify label is service-namespaced and not shared with DMARC/SPF/etc.
• no variable is used as a bare full record value — TXT uses prefix form crossly-verify=%verifyToken%, not bare %verifyToken%
• no bare variable is used as the full host label — _crossly-verify is a fixed label
• no variable is used in the host field to create a subdomain — the apply-time host query param drives the subdomain via hostRequired: true, records use literal @ / _crossly-verify
• %host% does not appear explicitly in any host attribute
• essential is set to OnApply on records the end user may need to modify or remove without breaking the template — the CNAME is marked essential: OnApply so registrars warn before overwriting it

Online Editor test results

Editor test link(s): will be posted as a follow-up comment

[github-actions]

PR Description Check Failed

The PR description is missing required elements. Please update it according to the PR template.

Details

  OK  Type of change: 1/4 checkboxes ticked
  OK  Checklist of common problems: 10/10 checkboxes ticked

Labels to add: PR description incomplete, Test links missing
Labels to remove: Checklist of common problems not complete, Forged editor links

PR description check FAILED:
  FAIL  'How Has This Been Tested?': 1/3 checkboxes are not ticked
  FAIL  'Online Editor test results': no valid editor test link found
  FAIL  Template coverage: crossly.net.storefront-subdomain.json: no editor test link found (expected template id 'crossly.net.storefront-subdomain')

[github-actions]

✅ JSON Filename Check Passed

[github-actions]

✅ JSON Schema Validation Passed

[github-actions]

Linter OK

crossly.net.storefront-subdomain.json

Level	Code	Note
info	DCTL1021	missing from iana definitions

[alphajew420]

Online Editor test results:

Test crossly.net/storefront-subdomain example.com/shop

[github-actions]

This PR is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 15 days.