Update public About bio, address, and headshot (#2)

## Summary
Closes #1.

- Replace About page bio with the western-suburbs / Exit Realty Redefined copy and Monica's headshot
- Add `CONTACT_ADDRESS` (`1245 Butterfield Rd. #100, Wheaton, IL 60189`) and show it on Contact, nav, footer, and structured data
- Align Home hero + service-area defaults with Chicago's western suburbs

## Test plan
- [ ] `/about/` shows new bio and headshot
- [ ] `/contact/` map block shows Butterfield Rd address
- [ ] Header / footer on Home show the address
- [ ] Set `CONTACT_ADDRESS` in deploy `.env` if not relying on defaults
- [ ] Confirm OG image for About uses the new headshot

Reviewed-on: #2

site/public/context_processors.py

@@ -20,8 +20,11 @@ def site_branding(request):
         "CONTACT_PHONE": phone,
         "CONTACT_PHONE_TEL": _phone_tel(phone),
         "CONTACT_EMAIL": settings.CONTACT_EMAIL or "",
+        "CONTACT_ADDRESS": getattr(settings, "CONTACT_ADDRESS", "") or "",
         "CONTACT_SERVICE_AREA": getattr(
-            settings, "CONTACT_SERVICE_AREA", "Serving Greater Metro Area"
+            settings,
+            "CONTACT_SERVICE_AREA",
+            "Serving Chicago's western suburbs",
         ),
         "CREDIT_NAME": getattr(settings, "CREDIT_NAME", "AI ML Operations, LLC"),
         "CREDIT_URL": getattr(