core/rawdb: improve the test suite for ancient store #32555
Merged
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Replace TruncateTail(0) with TruncateHead(0) in basicWrite. TruncateTail only advances the tail (prunes prunable tables) and does not reset the head/items count, so it does not “truncate everything.” Using TruncateHead(0) properly clears the ancient store to an empty state, allowing re-appending from index 0 and aligning with existing tests and the documented semantics in ethdb.