fix(taiko-client): curr range lookahead fix

[cyberhorsey]

current lookahead incorrectly returns current range of the current epoch for regardless of operator, this fixes it. Not a big issue because preconf sidecars also keep track of this, but should be fixed.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 26.40%. Comparing base (e30687c) to head (cb05c91).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/taiko-client/driver/driver.go	0.00%	1 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
...es/taiko-client/driver/preconf_blocks/lookahead.go	100.00% <100.00%> (ø)
packages/taiko-client/driver/driver.go	15.29% <0.00%> (ø)

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[Copilot]

Pull Request Overview

This PR fixes the lookahead logic so that the current range is correctly determined based solely on the current operator, rather than including the next operator as well. Key changes include:

• Modifying the SequencingWindowSplit logic to only consider currOps in lookahead.go.
• Updating unit tests in lookahead_test.go to reflect the new logic and adding extra test cases for alternative operator handling.
• Adding a clarifying comment in driver.go regarding operation pushing.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
packages/taiko-client/driver/preconf_blocks/lookahead_test.go	Updated test expectations and messages to validate revised lookahead splits.
packages/taiko-client/driver/preconf_blocks/lookahead.go	Revised logic to only check the current operator for lookahead range.
packages/taiko-client/driver/driver.go	Minor comment update to clarify operator pushing behavior.