Ignore default values and compress json length as much as possible

[Ghost-chu]

This PR compresses JSON size by：

• Specifying SerializedName to shorten the serialized field name
• Use block_id to serialize Material fields, integer is much shorter in most cases
• Stop serialization of field defaults (e.g. isAdult = true, slot = -1) with custom TypeAdapter

This PR saves about 60% of storage space on the production server over 60% storage usage on data_extra table.

Status	Proof
Old
New

[Ghost-chu]

Self-Review completed. Looks good.

[Ghost-chu]

Issues with connections running out and causing queue backlogs have been noted in production environments and are being rechecked PR

[Rothes]

Issues with connections running out and causing queue backlogs have been noted in production environments and are being rechecked PR

It has been an issue before the changes. Especially on my fork I enabled hoppers by default on last release.

[Ghost-chu]

Issues with connections running out and causing queue backlogs have been noted in production environments and are being rechecked PR

It has been an issue before the changes. Especially on my fork I enabled hoppers by default on last release.

Agree, I think this is a CN fork issue, I checked PR again and it should not cause connection pool run out, reopened