refactor(backend): ♻️ add initial support for global dependency injection

mealie/db/database.py

@@ -1,3 +1,10 @@
+from functools import lru_cache
+
 from .data_access_layer import DatabaseAccessLayer
 
 db = DatabaseAccessLayer()
+
+
+@lru_cache
+def get_database():
+    return db