Handle telemetry in non-interactive mode (#1002)

Changes:
- Ensure proper shutdown in non-interactive mode
- Ensures the initial user prompt is logged in non-interactive mode
- Improve telemetry for streaming - handle chunks and input token count is now alongside other token counts in response

To test:
- Follow instructions in https://github.com/google-gemini/gemini-cli/blob/main/docs/core/telemetry.md#google-cloud
- Run CLI in non-interactive mode and observe logs/metrics in GCP Logs Explorer and Metrics Explorer

#750

packages/cli/src/nonInteractiveCli.ts

@@ -9,6 +9,8 @@ import {
   ToolCallRequestInfo,
   executeToolCall,
   ToolRegistry,
+  shutdownTelemetry,
+  isTelemetrySdkInitialized,
 } from '@gemini-cli/core';
 import {
   Content,
@@ -119,5 +121,9 @@ export async function runNonInteractive(
   } catch (error) {
     console.error('Error processing input:', error);
     process.exit(1);
+  } finally {
+    if (isTelemetrySdkInitialized()) {
+      await shutdownTelemetry();
+    }
   }
 }