Subscription criteria Search Parameter Should Be Used With :exact Modifier

[hhund]

The Subscription criteria search parameter should only be used with the :exact modifier.

• If multiple Subscription resources for Task or QuestionnaireResponse resources exist, the bpe may use the wrong subscription resource.
• Creating a Subscription resources with criteria matching the start of an existing Subscription resources criteria will result in a 403 Forbidden because a falsely unique resource already exists.

[hhund]

Additionally: The optional channel.payload property is not handled correctly in the SubscriptionAuthorizationRule and the PL/pgSQL function subscriptions_unique.