refactor(types): auto -> None sweep across entire codebase

Applied 236 return type annotations to functions with no return values
across 100+ files (core modules, tests, scripts, simulations).
Added Phase 4 to python_style_refactor track for remaining 597 items
(untyped params, vars, and functions with return values).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

simulation/workflow_sim.py

@@ -4,7 +4,7 @@ from api_hook_client import ApiHookClient
 from simulation.user_agent import UserSimAgent
 
 class WorkflowSimulator:
- def __init__(self, hook_client: ApiHookClient):
+ def __init__(self, hook_client: ApiHookClient) -> None:
   self.client = hook_client
   self.user_agent = UserSimAgent(hook_client)
 
@@ -30,7 +30,7 @@ class WorkflowSimulator:
   self.client.select_list_item("disc_listbox", name)
   time.sleep(1)
 
- def load_prior_log(self):
+ def load_prior_log(self) -> None:
   print("Loading prior log")
   self.client.click("btn_load_log")
   # This usually opens a file dialog which we can't easily automate from here