Relay preset: issue with create mutation for composite PK each referencing polymorphic type

CREATE TABLE dependency (
    block_id UUID NOT NULL REFERENCES block(id) ON DELETE CASCADE,
    dependency_id UUID NOT NULL REFERENCES block(id) ON DELETE CASCADE,
    primary key (block_id, dependency_id)
);

COMMENT ON TABLE dependency IS E'@behavior -update';

create index on dependency (block_id);
create index on dependency (dependency_id);

(Where block is an @interface mode:relational polymorphic type)

Results in a create mutation but without the blockId and dependencyId inputs. This is likely because the relay preset removes these fields, instead preferring to use a NodeID - but the NodeID cannot be found since the referenced type is polymorphic.

graphile / crystal-pre-merge

Relay preset: issue with create mutation for composite PK each referencing polymorphic type #472