refactor: call database functions from app.Server.Database instead of directly from db

.air.toml

@@ -4,7 +4,7 @@ tmp_dir = "tmp"
 
 [build]
   args_bin = []
-  bin = "tmp\\main.exe"
+  bin = "tmp\\main.exe --log true"
   cmd = "go build -o ./tmp/main.exe ."
   delay = 1000
   exclude_dir = ["assets", "tmp", "vendor", "testdata", "uploads"]