support old and new wd tagger api

main.py

@@ -107,12 +107,17 @@ class SDInterrogator(Interrogator):
             log.info("got %d", resp.status)
             assert resp.status == 200
             data = await resp.json()
-            tags_with_weights = data["caption"]
-
             tags = []
 
-            for tag, weight in tags_with_weights.items():
-                tags.append(tag)
+            for maybe_tag, maybe_weight in data["caption"].items():
+                if isinstance(maybe_weight, float):
+                    tags.append(maybe_tag)
+                elif isinstance(maybe_weight, dict):
+                    for tag, weight in maybe_weight.items():
+                        assert isinstance(weight, float)
+                        tags.append(tag)
+                else:
+                    raise AssertionError(f"invalid weight: {maybe_weight!s}")
 
             upstream_tags = [tag.replace(" ", "_") for tag in tags]
             return " ".join(upstream_tags)