[fix](doc) name the default column compression algorithm (ZSTD)#3733
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The column-compression page said "If not specified explicitly, Doris uses the system default compression algorithm" without naming it. The default is ZSTD (FE config `default_compression_type`). Name it explicitly so users don't have to guess. Applied to the current/4.x EN and zh pages (the 2.1/3.x pages don't carry this sentence). Reported in apache#2652. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
The column-compression page lists the supported
compressionvalues and then says:…without naming which one. The default is ZSTD (FE configuration
default_compression_type). Name it explicitly so users don't have to guess:Applied to the current/4.x EN and zh pages. The 2.1/3.x pages don't carry this sentence, so no change there.
Reported in #2652.
Test plan
Config.default_compression_type = "ZSTD").Closes #2652