chore: add ty + pre-commit hook and repeal even more ruff rules (#9504)

* auto fixes

* auto fix pt2 and transitive deps and undefined var checking locals()

* manual fixes (ignored or letta-code fixed)

* fix circular import

* remove all ignores, add FastAPI rules and Ruff rules

* add ty and precommit

* ruff stuff

* ty check fixes

* ty check fixes pt 2

* error on invalid

letta/adapters/letta_llm_stream_adapter.py

@@ -143,7 +143,7 @@ class LettaLLMStreamAdapter(LettaLLMAdapter):
         # Extract tool call from the interface
         try:
             self.tool_call = self.interface.get_tool_call_object()
-        except ValueError as e:
+        except ValueError:
             # No tool call, handle upstream
             self.tool_call = None