Add schema check composed SDL fields to public API

Author: jdolle

.changeset/tough-lands-rule.md

@@ -0,0 +1,16 @@
+---
+'hive': patch
+---
+
+Add schema check composed SDL fields to public API
+
+```graphql
+query CheckComposedSchemas($targetRef: TargetReferenceInput!, $checkId: ID!) {
+  target(reference:  $targetRef) {
+    schemaCheck(id: $checkId) {
+      compositeSchemaSDL # newly added
+      supergraphSDL  # newly added
+    }
+  }
+}
+```

packages/services/api/src/modules/schema/module.graphql.ts

@@ -1639,8 +1639,8 @@ export default gql`
     """
     schemaPolicyErrors: SchemaPolicyWarningConnection
 
-    compositeSchemaSDL: String
-    supergraphSDL: String
+    compositeSchemaSDL: String @tag(name: "public")
+    supergraphSDL: String @tag(name: "public")
     """
     Results of the contracts
     """