add DataCops, First-party tracking

[simulsarker007]

Description

Adds a Domain Connect template for DataCops — a privacy-first ad-fraud analytics platform. The template adds a single CNAME (datacops → cdn.joindatacops.com) so DataCops can serve its tracker as first-party on the customer's domain. This is required for accurate measurement against ad blockers and Safari ITP.

Type of change

• New template

How Has This Been Tested?

• Template file name follows the pattern <providerId>.<serviceId>.json (joindatacops.com.firstparty.json)
• logoUrl is actually served — verified at https://app.joindatacops.com/logo.svg
• dc-template-linter -loglevel error -tolerate info -logos passes with exit code 0
• Online Editor test — the human maintainer of this PR (the DataCops team) will add the editor test link in a follow-up comment before merge. (Note: this PR was prepared with AI tooling assistance per AGENTS.md; per AGENTS.md, the editor test link must be generated by actually using the editor and so is left to a human.)

Checklist of common problems

• syncPubKeyDomain is set (_dc-key.joindatacops.com) — TXT record published & verified via dig +short TXT _dc-key.joindatacops.com @1.1.1.1
• warnPhishing is not set alongside syncPubKeyDomain
• syncRedirectDomain is set (app.joindatacops.com) — synchronous flow uses redirect_uri
• no TXT record contains SPF content
• no TXT records that need txtConflictMatchingMode (template adds only a CNAME)
• no variables used at all in this template
• no variables in host
• %host% does not appear in any host attribute
• essential not needed — the single CNAME is core to the service

[github-actions]

✅ JSON Filename Check Passed

[github-actions]

✅ JSON Schema Validation Passed

[github-actions]

Linter OK

joindatacops.com.firstparty.json

Level	Code	Note

[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: 1/1 checkboxes ticked
  OK  Checklist of common problems: 9/9 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?': 1/4 checkboxes are not ticked
  FAIL  'Online Editor test results' section not found
  FAIL  Template coverage: joindatacops.com.firstparty.json: no editor test link found (expected template id 'joindatacops.com.firstparty')