Invalid @default validation rules

[MacondoExpress]

Describe the bug

Current @default validation does not provide the correct error message for some typeDefs.

For instance:
Time issue:

type typeNode {
  time: Time @default(value: "10:00:00")
}

Raise the following error: "@default.value is not a valid Time" with a correct Time value.
The error in this case should be that Time is not supported.

DateTime case:
DateTime is a supported type, however, no validation rules happen for a List of DateTime values.

type typeNode {
  dateTimes: [DateTime] @default(value: ["dummy"])
}

The above, in fact, does not raise any error while dateTime: DateTime @default(value: "dummy") raise @default.value is not a valid DateTime.

Float case:
The Float type is supported, however, when not specifying the fraction part it raises an error:

type typeNode {
  float: Float @default(value: 1)
}

Raise the error: "@default.value on Float fields must be of type Float".
However, this is different from the GraphQL input specification:
https://spec.graphql.org/October2021/#sel-GAHXTHDCAACEB68G

System (please complete the following information):

• OS: MacOS
• Version: @neo4j/graphql@5.5.2
• Node.js version: 20

[neo4j-team-graphql]

Many thanks for raising this bug report @MacondoExpress. 🐛 We will now attempt to reproduce the bug based on the steps you have provided.

Please ensure that you've provided the necessary information for a minimal reproduction, including but not limited to:

• Type definitions
• Resolvers
• Query and/or Mutation (or multiple) needed to reproduce

If you have a support agreement with Neo4j, please link this GitHub issue to a new or existing Zendesk ticket.

Thanks again! 🙏

[neo4j-team-graphql]

We've been able to confirm this bug using the steps to reproduce that you provided - many thanks @MacondoExpress! 🙏 We will now prioritise the bug and address it appropriately.

[MacondoExpress]

Initial PR #5437 was introduced to fix this case on the v6 POC that was dismissed and needs to be backported to v6.