Integrate real-world fish market locations using public APIs

[jpdevhub]

Currently, our map and vendor locations rely on static or mock data. To make the app truly useful, we should integrate a public location API to dynamically fetch real-world fish markets, seafood vendors, and grocery stores based on the user's current GPS location.

Suggested APIs to evaluate:

• OpenStreetMap (Overpass API): Free and highly detailed for global markets (querying nodes like shop=seafood).
• Google Places API: Extremely accurate, but requires an API key and billing setup.

Acceptance Criteria:

• Update the backend map routes to query a real-world API based on a provided latitude/longitude radius.
• Standardize the response so the frontend MarketMapPage.tsx can render the pins perfectly.

[Aharshi3614]

Hi! I'd love to work on this issue. I have experience integrating location-based APIs and building map features.
For this task I can handle:

Evaluating OpenStreetMap Overpass API vs Google Places API and recommending the best fit
Updating the backend map routes to query real vendors by lat/lng radius
Standardizing the API response to match what MarketMapPage.tsx expects
Testing with real coordinates to verify pins render correctly

I'm already familiar with the FreshScanAi codebase so I can get started immediately. Can I be assigned?

[jpdevhub]

@Aharshi3614 go ahead!