fix(P1): 6 priority-1 bug fixes for autonomous engine and mood system

#4  Sleep/mood desync — set_server_mood() now clears is_sleeping when
    mood changes away from 'asleep', preventing ghost-sleep state.

#5  Race condition in _check_and_act — added per-guild asyncio.Lock so
    overlapping ticks + message-triggered calls cannot fire concurrently.

#6  Class-level attrs on ServerConfig — sleepy_responses_left,
    angry_wakeup_timer, and forced_angry_until are now proper dataclass
    fields with defaults, so asdict()/from_dict() round-trip correctly.
    Also strips unknown keys in from_dict() to survive schema changes.

#7  Persistence decay_factor crash — initialise decay_factor = 1.0
    before the loop so empty-server or zero-downtime paths don't
    raise NameError.

#8  Double record_action — removed the redundant call in
    autonomous_tick_v2(); only _check_and_act records the action now.

#9  Engine mood desync — on_mood_change() is now called inside
    set_server_mood() (single source of truth) and removed from 4
    call-sites in api.py, moods.py, and server_manager wakeup task.

bot/utils/autonomous_persistence.py

@@ -81,6 +81,7 @@ def load_autonomous_context() -> tuple[Dict[int, dict], Dict[int, float]]:
         
         context_data = {}
         last_action = {}
+        decay_factor = 1.0  # Default: no decay (in case loop doesn't execute)
         
         for guild_id_str, server_data in data.get("servers", {}).items():
             guild_id = int(guild_id_str)