Update docs to clarify other client HKDF support

[1egoman]

Updates the setKey function docs to make it clear that HKDF isn't supported by other client sdk platforms.

Closes #1791

Summary by CodeRabbit

• Documentation
  • Clarified encryption key-derivation guidance and recommended PBKDF2 for broad compatibility
  • Noted that HKDF may not be supported by all client SDKs
  • Added a patch-level documentation entry for the livekit-client package
  • Documentation-only update; no public API or runtime behavior changes

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[changeset-bot]

🦋 Changeset detected

Latest commit: ffb628d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
livekit-client	Patch

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[coderabbitai]

📝 Walkthrough

Walkthrough

Documentation-only changes: added a changeset for livekit-client and clarified JSDoc for ExternalE2EEKeyProvider.setKey() to note PBKDF2 usage for strings and that HKDF is not supported by all client SDKs. No runtime or public API changes.

Changes

Cohort / File(s)	Summary
Changelog documentation .changeset/slow-dingos-look.md	Added a patch-level changeset for livekit-client documenting the patch and noting HKDF support clarification.
Key derivation algorithm documentation src/e2ee/KeyProvider.ts	Updated JSDoc for ExternalE2EEKeyProvider.setKey(): clarified PBKDF2 for string input, reworded HKDF description for ArrayBuffer input, and added a note that not all client SDKs support HKDF.

Sequence Diagram(s)

(Skipped — changes are documentation-only and do not introduce new multi-component control flow.)

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 I hopped through lines of docs today,

PBKDF2 and HKDF in tidy array,
A tiny note, a clearer say,
I thump my feet and bound away,
Carrot crumbs and code hooray!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the main change: updating documentation to clarify that HKDF isn't supported by other client SDKs.
Linked Issues check	✅ Passed	The PR directly addresses issue #1791 by clarifying in documentation that HKDF is not supported by other client SDKs, answering the interoperability concern.
Out of Scope Changes check	✅ Passed	All changes are in-scope: the changeset documents the patch and the KeyProvider.ts updates clarify HKDF support documentation as required.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

• 📝 Generate docstrings

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📜 Recent review details

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Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 24394c7 and ffb628d.

📒 Files selected for processing (1)

• src/e2ee/KeyProvider.ts

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[github-actions]

size-limit report 📦

Path	Size
dist/livekit-client.esm.mjs	85.5 KB (0%)
dist/livekit-client.umd.js	94.3 KB (0%)

[coderabbitai]

Actionable comments posted: 2

🤖 Fix all issues with AI agents

In @.changeset/slow-dingos-look.md:
- Line 5: Fix the typo in the changelog sentence that reads "client client HKDF
support" by removing the duplicated word so it reads "client HKDF support";
locate the phrase "client client HKDF support" in the
.changeset/slow-dingos-look.md content and update it to "client HKDF support".

In `@src/e2ee/KeyProvider.ts`:
- Around line 94-97: Update the JSDoc in KeyProvider.ts to fix minor text
consistency: change "Array buffer" to "ArrayBuffer" and "client sdks" to "client
SDKs" in the comment block above the relevant KeyProvider methods (look for the
comment mentioning PBKDF2 and HKDF within the KeyProvider class or functions
that accept string vs ArrayBuffer keys) so the terminology matches the
TypeScript types and standard acronym capitalization.

📜 Review details

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 1744ee4 and c369723.

📒 Files selected for processing (2)

• .changeset/slow-dingos-look.md
• src/e2ee/KeyProvider.ts

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[xianshijing-lk]

two nits