feat(platform): complete the Gelios external data loop

services/external-data-plane/test/data-product-delivery.integration.test.mjs

@@ -38,6 +38,12 @@ try {
     deliveryMode: "snapshot+patch",
     semanticTypes: ["map.moving_object"],
     fields: ["source_id", "observed_at", "geometry", "status"],
+    fieldContracts: {
+      source_id: { type: "string", required: true },
+      observed_at: { type: "string", required: true },
+      geometry: { type: "point", required: true },
+      status: { type: "string", required: true },
+    },
     history: {
       mode: "sampled",
       intervalMs: 60_000,
@@ -47,6 +53,7 @@ try {
   });
   await persistDataProductDefinition(pool, definition);
   const storedDefinition = await loadDataProductDefinition(pool, definition.id);
+  assert.deepEqual(storedDefinition.fieldContracts, definition.fieldContracts);
   const binding = {
     id: "reader-binding-test",
     bindingKey: "managed-reader-binding-test",