Document possible rounding down of user deposits

[arr00]

Summary by CodeRabbit

• Documentation
  • Improved internal documentation for smart contract functions with detailed notes on behavior and calculations. No functional changes or user-facing updates.

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Walkthrough

A detailed developer comment was added to the onConfidentialTransferReceived function in BatcherConfidential.sol, explaining its purpose of depositing fromToken into batches, how toToken amounts are calculated via _claim, and rounding behavior for small deposits. No code logic changed.

Changes

Cohort / File(s)	Summary
Documentation Update contracts/finance/BatcherConfidential.sol	Replaced placeholder comment with comprehensive developer note documenting function purpose, _claim-based toToken calculation, and rounding behavior; no code changes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A comment was born, so helpful and bright,
Explaining the batcher's batching delight,
No code was changed, just words shining clear,
Documentation perfection—hooray and good cheer! 📝

🚥 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 accurately describes the main change: adding documentation about rounding behavior for deposits in the BatcherConfidential contract.
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
• Post copyable unit tests in a comment
• Commit unit tests in branch chore/add-docs-batcher

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