feat: implement /deb and /city command handlers for the bot.

src/bot/handlers/city.py

@@ -55,16 +55,36 @@ class CityCommandHandler:
         self.guard = guard
         self.city_service = city_service
         self.io_layer = io_layer
+        self._handled_message_keys: set[tuple[Any, Any]] = set()
+
+    def _mark_handled_once(self, message: Any) -> bool:
+        chat_id = getattr(getattr(message, "chat", None), "id", None)
+        message_id = getattr(message, "message_id", None)
+        key = (chat_id, message_id)
+        if key in self._handled_message_keys:
+            return False
+        self._handled_message_keys.add(key)
+        if len(self._handled_message_keys) > 4096:
+            self._handled_message_keys.clear()
+        return True
 
     def register(self) -> None:
+        @self.bot.message_handler(commands=["city"])
+        def _city_command(message):
+            self.handle(message)
+
         @self.bot.message_handler(
-            func=lambda message: _is_city_command_text(getattr(message, "text", None)),
+            regexp=r"^[/／⁄∕╱⧸]\s*city(@[A-Za-z0-9_]+)?(\s|$)",
             content_types=["text"],
         )
-        def _city(message):
+        def _city_regex(message):
             self.handle(message)
 
     def handle(self, message: Any) -> None:
+        if not self._mark_handled_once(message):
+            return
+        if not _is_city_command_text(getattr(message, "text", None)):
+            return
         trace = CommandTrace("/city", message)
         try:
             parts = (message.text or "").split(maxsplit=1)

src/bot/handlers/deb.py

@@ -55,16 +55,36 @@ class DebCommandHandler:
         self.guard = guard
         self.deb_service = deb_service
         self.io_layer = io_layer
+        self._handled_message_keys: set[tuple[Any, Any]] = set()
+
+    def _mark_handled_once(self, message: Any) -> bool:
+        chat_id = getattr(getattr(message, "chat", None), "id", None)
+        message_id = getattr(message, "message_id", None)
+        key = (chat_id, message_id)
+        if key in self._handled_message_keys:
+            return False
+        self._handled_message_keys.add(key)
+        if len(self._handled_message_keys) > 4096:
+            self._handled_message_keys.clear()
+        return True
 
     def register(self) -> None:
+        @self.bot.message_handler(commands=["deb"])
+        def _deb_command(message):
+            self.handle(message)
+
         @self.bot.message_handler(
-            func=lambda message: _is_deb_command_text(getattr(message, "text", None)),
+            regexp=r"^[/／⁄∕╱⧸]\s*deb(@[A-Za-z0-9_]+)?(\s|$)",
             content_types=["text"],
         )
-        def _deb(message):
+        def _deb_regex(message):
             self.handle(message)
 
     def handle(self, message: Any) -> None:
+        if not self._mark_handled_once(message):
+            return
+        if not _is_deb_command_text(getattr(message, "text", None)):
+            return
         trace = CommandTrace("/deb", message)
         try:
             parts = (message.text or "").split(maxsplit=1)