* fix: skip exhausted blocks before creating an interval
* refactor: optimize interval creation and fix logic duplication
* docs: add docstring for LocateData
* refactor: extract moveToNextBlock helper to deduplicate logic
* fix: use int64 for block index comparison to prevent overflow
* test: add unit test for LocateData boundary crossing (issue #8179)
* fix: skip exhausted blocks to prevent negative interval size and panics (issue #8179)
* refactor: apply review suggestions for test maintainability and code style