Plan prose had spec §8 idealized leaves, but the backend NotificationContext
only emits a subset:
ROUTE_METRIC / EXCHANGE_MATCH → route.id + route.uri (uri added)
LOG_PATTERN → log.pattern + log.matchCount (renamed from log.logger/level/message)
app.slug / app.id → scoped to non-env kinds (removed from 'always')
exchange.link / alert.comparator / alert.window / app.displayName → removed (backend doesn't emit)
Without this alignment the Task 11 linter would (1) flag valid route.uri as
unknown, (2) suggest log.{logger,level,message} as valid paths that render
empty, and (3) flag app.slug on env-wide rules.
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