Zone pruning for LIKE filters


### Discussed in https://github.com/vortex-data/vortex/discussions/5943

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<sup>Originally posted by **a10y** January 13, 2026</sup>
In the ZonedReader, we don't currently prune `LIKE` expressions since they don't report any stats falsification, but we should be able to prune using min/max stats for exact queries or prefix queries.</div>