feat(amazonq): Increase polling rate for Q agent code summary (#5843)

## Problem
Agent polling rate is too low, causing users to receive slow summary
updates of changes agent has made to their code


## Solution
- Decrease requestDelay to 5000ms from 10000ms to ensure we poll for
agent updates more frequently
- Increased pollCount to 360 from 180 as we are now polling twice as
frequently


---

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Author: juusticeTG

packages/amazonq/.changes/next-release/Feature-4540d7be-edc2-42ce-b7e7-6f04b2bd9106.json

@@ -0,0 +1,4 @@
+{
+	"type": "Feature",
+	"description": "Provide more frequent updates about code changes made by agent"
+}

packages/core/src/amazonqFeatureDev/session/sessionState.ts

@@ -131,8 +131,8 @@ function getDeletedFileInfos(deletedFiles: string[], workspaceFolders: CurrentWs
 }
 
 abstract class CodeGenBase {
-    private pollCount = 180
-    private requestDelay = 10000
+    private pollCount = 360
+    private requestDelay = 5000
     readonly tokenSource: vscode.CancellationTokenSource
     public phase: SessionStatePhase = DevPhase.CODEGEN
     public readonly conversationId: string