refactor: define hydrogen BI metric semantics

src/server/routes/analytics/index.test.ts

@@ -7,11 +7,21 @@ test('returns the published mileage metric contract', async () => {
   const payload = await response.json();
 
   assert.equal(response.status, 200);
-  assert.equal(payload.catalogVersion, 1);
+  assert.equal(payload.catalogVersion, 2);
   assert.deepEqual(payload.domains, ['mileage']);
   assert.ok(payload.metrics.some((metric: { id: string }) => metric.id === 'mileage.assessment_completion_rate'));
 });
 
+test('returns the published hydrogen metric contract', async () => {
+  const response = await app.request('/metrics?domain=hydrogen');
+  const payload = await response.json();
+
+  assert.equal(response.status, 200);
+  assert.deepEqual(payload.domains, ['hydrogen']);
+  assert.ok(payload.metrics.some((metric: { id: string }) => metric.id === 'hydrogen.customer_revenue'));
+  assert.ok(payload.metrics.some((metric: { id: string }) => metric.id === 'hydrogen.customer_order_gross_profit'));
+});
+
 test('rejects unpublished metric domains', async () => {
   const response = await app.request('/metrics?domain=energy');