Rename fittracker to milevault throughout

backend/app/main.py

@@ -45,7 +45,7 @@ async def lifespan(app: FastAPI):
 
 
 app = FastAPI(
-    title="FitTracker",
+    title="MileVault",
     version="1.0.0",
     lifespan=lifespan,
 )

backend/app/workers/tasks.py

@@ -6,7 +6,7 @@ from celery import Celery
 from app.core.config import settings
 
 celery_app = Celery(
-    "fittracker",
+    "milevault",
     broker=settings.redis_url,
     backend=settings.redis_url,
 )