phcurado / zoi / 6798199a1f85015b0fab08841ad5d4e2f72eeeb4

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Add JSONSchema.Encoder for Zoi.Types.Default (#121)

* Add JSONSchema.Encoder for Zoi.Types.Default

This adds JSON Schema encoding support for schemas wrapped with `Zoi.default/2`.
Previously, attempting to encode a schema like:

    Zoi.enum(["a", "b"]) |> Zoi.default("a")

Would raise "Encoding not implemented for schema".

Now it correctly encodes the inner type and adds the `default` field:

    %{type: :string, enum: ["a", "b"], default: "a"}

Includes tests for string, enum, optional enum, and integer defaults.

* Consolidate default value tests per code review feedback

Move default value test case into "different schemas to json" test
since Default is an encapsulated type that doesn't need type-specific
testing.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

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