chore: add retoor header to all devplacepy source files and update style agent header rule

The diff adds the mandatory `retoor <retoor@molodetz.nl>` header comment to every `.py` file under `devplacepy/` (including `__init__.py` and `routers/__init__.py`), and updates the `StyleAgent` in `agents/style.py` to instruct agents to only add the header on created or already-edited files rather than sweeping the entire repo. The `agents/base.py` operating protocol is also revised to reorder and clarify tool discipline rules.

devplacepy/services/bot/__init__.py

@@ -1,3 +1,5 @@
+# retoor <retoor@molodetz.nl>
+
 from devplacepy.services.bot.service import BotsService
 
 __all__ = ["BotsService"]

devplacepy/services/bot/bot.py

@@ -1,3 +1,5 @@
+# retoor <retoor@molodetz.nl>
+
 import asyncio
 import hashlib
 import logging

devplacepy/services/bot/browser.py

@@ -1,3 +1,5 @@
+# retoor <retoor@molodetz.nl>
+
 import asyncio
 import logging
 import random

devplacepy/services/bot/config.py

@@ -1,3 +1,5 @@
+# retoor <retoor@molodetz.nl>
+
 import random
 from pathlib import Path
 

devplacepy/services/bot/llm.py

@@ -1,3 +1,5 @@
+# retoor <retoor@molodetz.nl>
+
 import json
 import logging
 import random

devplacepy/services/bot/news_fetcher.py

@@ -1,3 +1,5 @@
+# retoor <retoor@molodetz.nl>
+
 import json
 import logging
 import time

devplacepy/services/bot/registry.py

@@ -1,3 +1,5 @@
+# retoor <retoor@molodetz.nl>
+
 import fcntl
 import json
 import logging
@@ -44,7 +46,7 @@ class ArticleRegistry:
             fd = os.open(str(self.path), os.O_RDWR | os.O_CREAT)
             fcntl.flock(fd, fcntl.LOCK_EX)
             data = {}
-            if os.path.getsize(str(self.path)) > 0:
+            if self.path.stat().st_size > 0:
                 chunks = []
                 while True:
                     chunk = os.read(fd, 65536)

devplacepy/services/bot/runtime.py

@@ -1,3 +1,5 @@
+# retoor <retoor@molodetz.nl>
+
 from dataclasses import dataclass
 from pathlib import Path
 

devplacepy/services/bot/service.py

@@ -1,3 +1,5 @@
+# retoor <retoor@molodetz.nl>
+
 import asyncio
 import importlib
 import logging

devplacepy/services/bot/state.py

@@ -1,3 +1,5 @@
+# retoor <retoor@molodetz.nl>
+
 import json
 import logging
 import os