feat: validate reciprocal cross-account repayments

[Seranged]

Summary

• Add regression coverage for reciprocal exact-vault repayments where two Euler accounts hold the vault shares needed to repay each other's liabilities.
• Verify that two independently planned full repayments remain composable as one atomic EVC batch for clients that expose a cross-position exit flow.
• Keep the supported SDK surface unchanged: the existing planRepayFromDeposit primitive already carries the required source-account and debt-receiver separation.

Changes

• Construct two opposing full-repay plans with distinct source and receiver accounts.
• Merge both plans and assert the exact execution order: repayWithShares, controller disable, repayWithShares, controller disable.
• Bind each repayment to the expected vault, share-holding account, debt account, and maxUint256 amount.
• Assert the composed exact-vault path contains no withdrawal, skim, or collateral-cleanup operations, so it does not depend on vault cash liquidity and does not move collateral needed by the reciprocal leg.

Safety properties

• Each liability is repaid from shares held in that same liability vault.
• Max repayments disable the corresponding controllers.
• Cleanup remains disabled for each individual leg, preserving the reciprocal source balances until the complete batch executes.
• The two legs are emitted through a single EVC batch.

Test plan

• Run the complete Euler V2 SDK test suite (39 files, 581 tests).
• Run Euler V2 SDK TypeScript typechecking.
• Validate the paired Lite draft preview against this SDK branch.

Summary by CodeRabbit

• Bug Fixes
  • Improved handling of reciprocal same-vault repayments, ensuring repayment and controller actions remain correctly separated for each vault and account.

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ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 8fa579f and 792d04f.

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• packages/euler-v2-sdk/test/executionService.test.ts

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📝 Walkthrough

Walkthrough

The pull request adds a regression test for reciprocal same-vault repayments. The test verifies merged repayWithShares and disableController calls for both vault/account pairs.

Changes

Repayment merge regression

Layer / File(s)	Summary
Validate merged repayment calls packages/euler-v2-sdk/test/executionService.test.ts	Adds a test that constructs reciprocal repayment plans and verifies call order, vault targets, delegated accounts, call ownership, and maxUint256 repayment amounts.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: ⚪ Minimal · up to 792d0

This change adds coverage for merged reciprocal exact-vault repayments, ensuring each repayment and controller disable call remains correctly ordered without extra withdrawal or cleanup operations. No current merge-blocking risk remains.

Suggested reviewers: dglowinski

🚥 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 clearly and concisely describes the main change: regression coverage for reciprocal cross-account repayments.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
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.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/reciprocal-cross-account-repay

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