[ISSUE-036] Google Maps API Integration

## Phase 6: Cost Tracking & External APIs (Weeks 10-11)

### Description
Set up Google Maps SDK
Implement store location search
Create route optimization logic
Calculate distances and travel times

### Dependencies
- #001

### Can Work in Parallel With
- #033
- #037

Start by reviewing the Phase 6 requirements and dependency #001; the payload names no files, tests, or entry points. Done means the Google Maps SDK is set up, store location search works, routes can be optimized, and distances and travel times are calculated.

Written by the indexing model from the issue text.