[Compression] Prevent overriding `COMPRESSION_EMPTY` with `COMPRESSION_CONSTANT`#19913

Merged

Mytherin merged 2 commits intoduckdb:v1.4-andiumfrom

Tishj:dict_fsst_null_filter_fix

Nov 25, 2025

Commits on Nov 24, 2025

prevent overriding compression_empty to compression_constant, as the filter logic doesn't work otherwise
Tishj
committed
clean up test, fix formatting
Tishj
committed