backport: Merge bitcoin/bitcoin#26733

[cryptotura]

backporting

[github-actions]

✅ No Merge Conflicts Detected

This PR currently has no conflicts with other open PRs.

[coderabbitai]

Walkthrough

The changes add two new test scenarios to the wallet functionality tests. The first scenario tests the sendmany operation with an explicit fee_rate parameter, where transaction fees are subtracted from multiple recipients. It creates addresses, sends DASH to them with fee subtraction enabled, advances the network, and verifies the received amounts reflect the fee deductions. The second scenario introduces a parallel test path that exercises explicit fee_rate specification alongside existing fee-rate tests, validating outcomes for sendtoaddress and sendmany operations.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

🚥 Pre-merge checks | ✅ 1 | ❌ 2

❌ Failed checks (1 warning, 1 inconclusive)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.
Description check	❓ Inconclusive	The description 'backporting' is vague and generic, using a non-descriptive term that doesn't convey meaningful information about what is being backported or why.	Expand the description to include what feature or test is being backported and its purpose, e.g., 'Backport Bitcoin PR #26733: Add test for sendmany with subtractfeefrom parameter to verify fee deduction from multiple recipients.'

✅ Passed checks (1 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'backport: Merge bitcoin#26733' accurately describes the main change—backporting a specific Bitcoin commit into the Dash repository.

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✨ Finishing touches

• 📝 Generate docstrings

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