Document approval requirement in IERC7984Receiver

[arr00]

Summary by CodeRabbit

• Documentation
  • Updated interface documentation with clarification regarding token contract permissions for confidential transfers.

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Walkthrough

Documentation update to the IERC7984Receiver interface's onConfidentialTransferReceived function, adding a NOTE clarifying that token contracts must have permission to read confidential return values. No functional or structural changes.

Changes

Cohort / File(s)	Summary
Interface Documentation contracts/interfaces/IERC7984Receiver.sol	Added NOTE to onConfidentialTransferReceived function documentation specifying that the calling token contract requires permission to read encrypted return values.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• Document possible rounding down of user deposits #327: Updates developer-facing comments for the onConfidentialTransferReceived function in BatcherConfidential, providing related documentation clarity for the same interface method.

Poem

🐰 A note in the docs, so clear and so bright,
Permission to read what's hidden from sight,
Encrypted secrets now plainly declared,
The path for token contracts, carefully prepared! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title directly describes the main change: documenting an approval requirement in the IERC7984Receiver interface, which matches the summary's documentation update.
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 unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch doc/document-approval-requirement-IERC7984Receiver

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