fix(types): resolve pre-existing basedpyright errors in py/ and standalone.py

Fix ~950 basedpyright errors across the backend:
- Convert ineffective # type: ignore comments to # pyright: ignore[rule]
- Add missing generic type arguments (Dict[str, Any], list[Any], ...)
- Annotate dynamic dict literals and runtime-initialized attributes
- Widen CivitAI provider tuple signatures in recipe parsers
- Remove dead LoraRoutes handlers calling nonexistent LoraService methods
- Suppress unavoidable ServiceRegistry import cycles (basedpyright counts
  function-local imports as cycle edges)

py/services/agent/post_processor.py

@@ -295,7 +295,7 @@ class PostProcessor:
         normalises every tag to lowercase for case-insensitive dedup.
         """
         merged: List[str] = []
-        seen: set = set()
+        seen: set[str] = set()
         for tag in list(existing) + list(new):
             t = tag.strip().lower()
             if t and t not in seen: