Design spec and Plan 02 described AlertCondition polymorphism as
Id.DEDUCTION, but the code that shipped in PR #140 uses Id.NAME with
property="kind" and include=EXISTING_PROPERTY. The `kind` field is
real on every subtype and the DB stores it in a separate column
(condition_kind), so reading the discriminator directly is simpler
than deduction — update the docs to match. Also add `"kind"` to the
example JSON payloads so they match on-wire reality.
OutboundAuth (Plan 01) correctly still uses Id.DEDUCTION and is
unchanged.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
