Record timestamp with code assist metrics. (#15439)

packages/core/src/code_assist/server.test.ts

@@ -184,6 +184,9 @@ describe('CodeAssistServer', () => {
                 firstMessageLatency: expect.stringMatching(/\d+s/),
               }),
             }),
+            timestamp: expect.stringMatching(
+              /\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{3}Z/,
+            ),
           }),
         ]),
       }),
@@ -244,6 +247,9 @@ describe('CodeAssistServer', () => {
             conversationOffered: expect.objectContaining({
               traceId: 'stream-trace-id',
             }),
+            timestamp: expect.stringMatching(
+              /\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{3}Z/,
+            ),
           }),
         ]),
       }),
@@ -266,6 +272,9 @@ describe('CodeAssistServer', () => {
         metrics: expect.arrayContaining([
           expect.objectContaining({
             conversationInteraction: interaction,
+            timestamp: expect.stringMatching(
+              /\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{3}Z/,
+            ),
           }),
         ]),
       }),

packages/core/src/code_assist/server.ts

@@ -241,7 +241,7 @@ export class CodeAssistServer implements ContentGenerator {
     await this.recordCodeAssistMetrics({
       project: this.projectId,
       metadata: await getClientMetadata(),
-      metrics: [{ conversationOffered }],
+      metrics: [{ conversationOffered, timestamp: new Date().toISOString() }],
     });
   }
 
@@ -255,7 +255,12 @@ export class CodeAssistServer implements ContentGenerator {
     await this.recordCodeAssistMetrics({
       project: this.projectId,
       metadata: await getClientMetadata(),
-      metrics: [{ conversationInteraction: interaction }],
+      metrics: [
+        {
+          conversationInteraction: interaction,
+          timestamp: new Date().toISOString(),
+        },
+      ],
     });
   }