## Summary Closes #17. - Join USPS EDDM GIS stats onto the carrier-route picker: household size, median income, business count. - Add Open USPS EDDM map link next to Find routes. - GIS miss stays a dash and does not block Find routes. PCM households and cost unchanged. Template: westfarn/web_django_template#13 ## Test plan - [ ] Find routes for a ZIP; table shows Size / Income / Businesses columns - [ ] Missing GIS values render as — - [ ] Open USPS EDDM map opens eddm.usps.com - [ ] Quote and 1–2 route send still work - [ ] `CarrierRoutePostcardTests` pass Reviewed-on: #18