- coercionProperties collapses each declaration before comparing types. A
nullable schema written as an `anyOf` states no top-level `type`, so
`number | null` and `boolean | null` both read as "no type" and counted
as agreeing — and `value=true` then came back as `NaN` through the first
branch's number.
- admitsNull reads an `enum` offering null, under the same sibling conditions
a `const: null` answers to. Without it `{ enum: [null] }` reported that it
rejects null, and a required read-only field spelled that way stayed
permanently invalid.
Signed-off-by: cliffhall <cliff@futurescale.com>
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