Add successData for split parent transaction reportID

[MelvinBot]

Explanation of Change

When a card expense is split, the parent transaction's reportID is optimistically set to SPLIT_REPORT_ID ('-2') to hide it from the report. There was optimisticData to set this and failureData to roll it back, but no successData to confirm the value after the server responds. This meant if the server response or a Pusher event returned the original transaction with its real reportID, the optimistic '-2' value was overwritten — causing the parent to reappear alongside the split children and double-counting the total.

This PR adds the missing successData entry for the original transaction in the !isReverseSplitOperation block of updateSplitTransactions, confirming reportID: CONST.REPORT.SPLIT_REPORT_ID so it persists after server confirmation.

Fixed Issues

$ #88358
PROPOSAL: #88358 (comment)

Tests

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Offline tests

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QA Steps

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PR Author Checklist

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Screenshots/Videos

Android: Native

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

---

AI Tests:

• TypeScript typecheck: Passed
• Lint (changed files): Passed (no lintable files changed)
• Prettier: Passed (unchanged)
• Jest: Running (full suite)

Co-authored-by: brunovjk brunovjk@users.noreply.github.com

[brunovjk]

@MelvinBot please close this PR, the issue is no longer reproducible.

[MelvinBot]

Closing this PR as requested by brunovjk — the issue is no longer reproducible.

[brunovjk]

@MelvinBot close this PR

[MelvinBot]

Closed this PR as requested by brunovjk.