Sort all JSON object keys alphabetically at every level in toolsnaps by
unmarshaling and remarshaling. This leverages Go's built-in behavior where
json.Marshal automatically sorts map keys alphabetically, ensuring
consistent field ordering and eliminating noop churn in diffs.
Co-authored-by: SamMorrowDrums <4811358+SamMorrowDrums@users.noreply.github.com>
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OpenAI strict mode requires the `properties` field to be present in
object schemas, even when empty. The jsonschema library uses omitempty
which causes empty maps to be omitted during JSON serialization.
This change uses json.RawMessage to bypass the library's serialization
and explicitly include `"properties": {}` in the output.
Fixes#1548