Add conversation history feature with AgentCore Memory

[inoue22]

Issue #, if available:

Description of changes:

Description

This PR adds conversation history functionality using Amazon Bedrock AgentCore Memory, enabling users to view and continue past chat sessions.

Changes

AWS CDK

• AgentCoreInfraStack: Add IAM policy for agent role to access AgentCore Memory (CreateEvent, GetEvent, ListEvents, DeleteEvent, ListSessions)
• AgentCoreAuth: Add Cognito Identity Pool with IAM role for authenticated frontend users to access AgentCore Memory (ListSessions, ListEvents)
• AgentCoreRuntime: Add CfnMemory resource with 365-day event expiry, pass Memory ID as environment variable to agent runtime

AgentCore Runtime

• Integrate AgentCoreMemorySessionManager with Strands Agents for automatic session persistence
• Accept actorId and sessionId from request payload

Frontend

• Add ChatHistorySidebar component for displaying past sessions
• Add useChatHistory hook for fetching sessions and messages from AgentCore Memory
• Add messageParser.ts utility for parsing AgentCore Memory event payloads (handles both conversational and blob payload types)
• Update App.tsx to support session selection and creation

Deployment Scripts

• Pass VITE_MEMORY_ID and VITE_IDENTITY_POOL_ID environment variables to frontend build

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[benlec]

thanks, I will have a look at this.

[inoue22]

Thank you for looking into this.
Reverted the Dockerfile changes for build-essential installation as the issue was resolved.