Unable to specify LZ4 compression level

[asg0451]

CompressionCoded.WithLevel casts its argument to byte and maxes out at 127. -

franz-go/pkg/kgo/compression.go

Line 71 in a5f2b71

if level > 127 {

However, LZ4 compression levels are much larger than that - https://github.com/pierrec/lz4/blob/v4/options.go#L155 - they are defined as 0, 512, 1024, ... , 131072.

Specifying LZ4 compression level in franz-go therefore will always result in the default.

[twmb]

I think this should be a relatively small fix by converting that internally to an int

[asg0451]

i agree. i can take a stab at this today.

[asg0451]

#781