fix(telegram): avoid rich final duplicate previews (#46206)

hermes_cli/config.py

@@ -1990,7 +1990,7 @@ DEFAULT_CONFIG = {
         "channel_prompts": {},         # Per-chat/topic ephemeral system prompts (topics inherit from parent group)
         "allowed_chats": "",           # If set, bot ONLY responds in these group/supergroup chat IDs (whitelist)
         "extra": {
-            "rich_messages": True,      # Bot API 10.1 rich messages; set false to force legacy MarkdownV2
+            "rich_messages": False,     # Opt in to Bot API 10.1 rich messages; default uses legacy MarkdownV2
         },
     },
 
@@ -2327,7 +2327,7 @@ DEFAULT_CONFIG = {
         # delivered as a fresh message if the preview has been visible at
         # least this many seconds, so the platform timestamp reflects
         # completion time. Telegram only; other platforms ignore it.
-        "fresh_final_after_seconds": 60.0,
+        "fresh_final_after_seconds": 0.0,
     },
 
     # Session storage — controls automatic cleanup of ~/.hermes/state.db.