Empty Set does not encode property

[grahamburgsma]

Describe the issue

Incorrect column type when encoding an empty Set

Vapor version

4.95

Operating system and version

macOS 14.4

Swift version

Swift Package Manager - Swift 5.10.0-dev

Steps to reproduce

I'm using a Fluent model with a field defined as:

@Field(key: "things")
var things: Set<Thing>

where Thing is an Int enum.

Attempt to create/insert a model where things = [].

Outcome

I get the following error:

[ WARNING ] PSQLError(code: server, serverInfo: [sqlState: 42804, file: parse_target.c, hint: You will need to rewrite or cast the expression., line: 595, message: column "things" is of type integer[] but expression is of type jsonb[], position: 256, routine: transformAssignedExpr, localizedSeverity: ERROR, severity: ERROR], triggeredFromRequestInFile: PostgresKit/PostgresDatabase+SQL.swift, line: 71

Additional notes

It works when set to a non-empty Set.