add telegram post creation feature but experimental

src/config.py

@@ -69,6 +69,13 @@ class Settings(BaseSettings):
     redis_url: str = "redis://redis:6379/0"
     scheduler_enabled: bool = False  # True only on dedicated scheduler container
 
+    # Telegram Bot (experimental)
+    telegram_enabled: bool = False
+    telegram_bot_token: str = ""
+    telegram_bot_username: str = ""       # e.g. "MyLinkedInBot" (without @)
+    telegram_webhook_secret: str = ""     # Random string to validate incoming webhooks
+    telegram_webhook_url: str = ""        # Base URL of the app, e.g. https://app.example.com
+
     model_config = SettingsConfigDict(
         env_file=".env",
         env_file_encoding="utf-8",