Deprecate Config.get_system_prompt() and fix callback type annotation

- 7a: Config.get_system_prompt() now logs a deprecation warning.
  PersonalityManager.get_system_prompt() is the canonical source (wired
  in commit 4). LLMConfig.system_prompt kept for backwards compat as
  fallback when personality is not configured.
- 7b: Fix AnnouncementScheduler callback type from asyncio.coroutine
  (a decorator, not a type) to Awaitable[None] from typing

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

meshai/announcements.py

@@ -3,7 +3,7 @@
 import asyncio
 import logging
 import random
-from typing import Callable, Optional
+from typing import Awaitable, Callable, Optional
 
 from .config import AnnouncementsConfig
 
@@ -16,7 +16,7 @@ class AnnouncementScheduler:
     def __init__(
         self,
         config: AnnouncementsConfig,
-        send_callback: Callable[[str, int], asyncio.coroutine],
+        send_callback: Callable[[str, int], Awaitable[None]],
     ):
         """Initialize the announcement scheduler.
 

meshai/config.py

@@ -1,5 +1,6 @@
 """Configuration management for MeshAI."""
 
+import logging
 import os
 from dataclasses import dataclass, field
 from pathlib import Path
@@ -7,6 +8,8 @@ from typing import Optional
 
 import yaml
 
+_config_logger = logging.getLogger(__name__)
+
 
 @dataclass
 class BotConfig:
@@ -284,7 +287,15 @@ class Config:
     _config_path: Optional[Path] = field(default=None, repr=False)
 
     def get_system_prompt(self) -> str:
-        """Get effective system prompt, preferring personality config."""
+        """Get effective system prompt, preferring personality config.
+
+        Deprecated: Use PersonalityManager.get_system_prompt() instead.
+        Kept for backwards compatibility.
+        """
+        _config_logger.warning(
+            "Config.get_system_prompt() is deprecated. "
+            "Use PersonalityManager.get_system_prompt() instead."
+        )
         if self.personality.system_prompt:
             return self.personality.system_prompt
         return self.llm.system_prompt