feat: backend foundation setup with SQLite and FastAPI

backend/main.py

@@ -0,0 +1,12 @@
+from fastapi import FastAPI
+from . import models
+from .database import engine
+
+# Create the database tables
+models.Base.metadata.create_all(bind=engine)
+
+app = FastAPI(title="Inventory PWA API", version="0.1.0")
+
+@app.get("/")
+def read_root():
+    return {"message": "Inventory API is running"}