[ISSUE-023] AWS Bedrock Integration

## Phase 5: AI Infrastructure & Meal Planning (Weeks 7-9)

### Description
Set up AWS Bedrock SDK
Configure Claude-3 model access
Implement prompt engineering utilities
Add token usage tracking for cost management
Create fallback error handling

### Dependencies
- #001

### Can Work in Parallel With
- #024
- #025

No files, tests, or entry points are named; start by reviewing dependency #001 and the repository structure to locate the AI infrastructure area. Done means the AWS Bedrock SDK and Claude-3 access are configured, prompt utilities and token tracking exist, and fallback error handling covers the integration.

Written by the indexing model from the issue text.