feat: проверка существования канала при привязке

src/config.py

@@ -12,6 +12,10 @@ class AppConfig(BaseModel):
     URL: str
 
 
+class ParserConfig(BaseModel):
+    URL: str
+
+
 class Settings(BaseSettings):
     model_config = SettingsConfigDict(env_file='.env', case_sensitive=False, env_nested_delimiter='__')
 
@@ -20,6 +24,7 @@ class Settings(BaseSettings):
     logger: LoggerConfig
     telegram: TelegramConfig
     jwt: JWTConfig
+    parser: ParserConfig
 
 
 settings: Settings = load_settings(Settings)