Fix jsonLdService method call in ApRendererService

[PrivateGER]

What

Updated the jsonLdService.signRsaSignature2017() method call to use the .use() accessor pattern in the ActivityPub renderer service.

Why

The jsonLdService appears to require using the .use() method to access its functionality, likely due to a service initialization or dependency injection pattern. This change ensures the method is called correctly on the service instance.

Additional info

• Minimal change affecting only the ActivityPub signature generation flow
• No functional behavior change, only correcting the API usage pattern

https://claude.ai/code/session_01JzqoS7cjvodFiWW6qZxyXL

Summary by CodeRabbit

• Refactor
  • Internal optimization to signature handling in ActivityPub processing. No user-visible changes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 84db2462-73b8-4c18-8270-7c9b867d8907

📥 Commits

Reviewing files that changed from the base of the PR and between cd1bcd4 and d53fb46.

📒 Files selected for processing (1)

• packages/backend/src/core/activitypub/ApRendererService.ts

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Walkthrough

In ApRendererService.attachLdSignature, the RSA signature attachment call is changed from this.jsonLdService.signRsaSignature2017(...) to this.jsonLdService.use().signRsaSignature2017(...), inserting a .use() accessor before invoking the signing method. No other logic is modified.

Changes

LD Signature Service Call Fix

Layer / File(s)	Summary
Fix jsonLdService.use() signing call packages/backend/src/core/activitypub/ApRendererService.ts	Replaces the direct jsonLdService.signRsaSignature2017(...) call with jsonLdService.use().signRsaSignature2017(...), changing how the signing service instance is obtained before applying the LD signature.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately and concisely describes the main change: fixing the jsonLdService method call to use the proper accessor pattern.
Description check	✅ Passed	The description includes all key template sections (What, Why, Additional info) with substantive content explaining the fix and its rationale.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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

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• Create stacked PR
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🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch claude/eloquent-franklin-jmw7ci

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