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/serialize_schemas/marshmallow_block.py

@@ -34,4 +34,4 @@ class SerializedBlockSchema(BaseSchema):
 
     class Meta(BaseSchema.Meta):
         model = Block
-        exclude = BaseSchema.Meta.exclude + ("agents", "identities", "is_deleted", "groups", "organization")
+        exclude = (*BaseSchema.Meta.exclude, "agents", "identities", "is_deleted", "groups", "organization")