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>

log_registry.py

@@ -20,7 +20,7 @@ class LogRegistry:
   self.data = {}
   self.load_registry()
 
- def load_registry(self):
+ def load_registry(self) -> None:
   """
         Loads the registry data from the TOML file into memory.
         Handles date/time conversions from TOML-native formats to strings for consistency.
@@ -48,7 +48,7 @@ class LogRegistry:
   else:
    self.data = {}
 
- def save_registry(self):
+ def save_registry(self) -> None:
   """
         Serializes and saves the current registry data to the TOML file.
         Converts internal datetime objects to ISO format strings for compatibility.
@@ -151,7 +151,7 @@ class LogRegistry:
    # Check the top-level 'whitelisted' flag. If it's not set or False, it's not whitelisted.
   return session_data.get('whitelisted', False)
 
- def update_auto_whitelist_status(self, session_id: str):
+ def update_auto_whitelist_status(self, session_id: str) -> None:
   """
         Analyzes session logs and updates whitelisting status based on heuristics.
         Sessions are automatically whitelisted if they contain error keywords,