[storage] use binary compression format to store the metadata of fuse

[sundy-li]

Summary

Loading hits dataset into databend, it will generate ~ 16 segments.

Each segment's metadata is stored in JSON format. The segment contains so many fields which makes the file too large.

Hits dataset is small (9kw rows, 20GB compressed data), but the metadata just took 16 * 12M = 172MB, we need to reduce the metadata size (Storage as Binary & compression format).

❯ du -sh  _data/1/208469/_sg/f48d4df4462144a3a234fef0d8cd28bf_v2.json
12M     _data/1/208469/_sg/f48d4df4462144a3a234fef0d8cd28bf_v2.json

If we set table_meta_segment_count to zero, each query will load the segment metadata multiple times which works very slowly!

Thought we already cached this, it could be better in smaller size.

[jun0315]

/assignme