Actions and invocations

An action(...) value is a typed reference to one or more enabled canonical user mutations. An invocation(...) is a complete typed call value for enabled local user mutations with operation identity and all required inputs. action(target,{recordParameter=row}) binds every record parameter, preserving identity and expected version, and leaves non-record inputs to the form. An invocation instead supplies its owning input object with invocation(target,{arguments}). Arbitrary partial argument binding or conversion from text/JSON is invalid. Binding an action in a page or form does not create a second mutation implementation; the canonical operation still checks admission, current versions, guards, and rules.