veeso / ic-dbms / 21749840383

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refactor(api): replace like crate with custom LIKE pattern engine (#42)

* refactor(api): replace `like` crate with custom LIKE pattern engine

Remove the external `like` dependency and implement an in-house SQL LIKE
pattern matcher with an iterative two-pointer algorithm. The new engine
runs in O(n*m) worst-case with O(1) space and zero heap allocation,
replacing the previous recursive approach that had exponential worst-case
complexity. Includes full Unicode/multi-byte character support.

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