kdrantJson
The default Json Kdrant uses to decode point payloads.
ignoreUnknownKeys = true: decoding a payload into your own type silently ignores fields you did not model.encodeDefaults = false+explicitNulls = false: never emitnull/default fields, matching how Qdrant distinguishes an absent field from an explicitnull.
Used as the default by payloadAs and searchAs; pass your own Json to either to override it.