Gate IndexNow pings behind privacy config

[ErisDS]

Summary

IndexNow notifies search engines when content is published or updated by pinging an external API. Tests and local dev run against real networks, so the ping can fire from non-production environments.

This gates the ping behind Ghost's existing privacy config:

• config.isPrivacyDisabled('useIndexNow') short-circuits the ping, consistent with update-check, gravatar, and structured data
• Can be disabled via privacy: {useIndexNow: false} or privacy: {useTinfoil: true}
• Default behaviour is unchanged — with no privacy config set, the ping still fires in production
• Also sets privacy__useIndexNow=false in the e2e environment, which boots Ghost with real network access

Tests

• Added a unit test asserting the ping is skipped when privacy.useIndexNow is disabled
• Existing IndexNow unit tests pass

[coderabbitai]

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ℹ️ Recent review info

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Run ID: 64056eca-fc1b-4e37-967c-15121ebbd975

📥 Commits

Reviewing files that changed from the base of the PR and between df927df and d53df93.

📒 Files selected for processing (3)

• e2e/helpers/environment/constants.ts
• ghost/core/core/server/services/indexnow.js
• ghost/core/test/unit/server/services/indexnow.test.js

🚧 Files skipped from review as they are similar to previous changes (3)

• ghost/core/test/unit/server/services/indexnow.test.js
• e2e/helpers/environment/constants.ts
• ghost/core/core/server/services/indexnow.js

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Walkthrough

This PR adds a privacy gate to the IndexNow service: the service imports the shared config module and returns early from ping() when config.isPrivacyDisabled('useIndexNow') is true. Unit tests import and stub config.isPrivacyDisabled and add a test asserting no outbound IndexNow request when the privacy setting disables it. The e2e environment constants are updated to include privacy__useIndexNow=false.

Possibly related PRs

• TryGhost/Ghost#28311: Adds an early-guard check to IndexNow ping() (URL resolution condition) with corresponding unit test updates, following a similar pattern for conditional request skipping.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main change: gating IndexNow pings behind privacy configuration.
Description check	✅ Passed	The description is directly related to the changeset, explaining the rationale, implementation details, and test coverage for the IndexNow privacy gating feature.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch indexnow-privacy-config

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