[Bug] Telegram Topic-level requireMention: false does not override group-level requireMention: true

Bug Report

Description

When require_mention: true is set at the group level and require_mention: false
is set for a specific topic, the topic-level setting is ignored. Bot still requires
a mention inside that topic.

Config

{
  "channels": {
    "telegram": {
      "token": "...",
      "groups": {
        "-1003710073308": {
          "require_mention": true,
          "topics": {
            "42": {
              "require_mention": false,
              "allow_from": ["tg:USER_ID"]
            }
          }
        }
      }
    }
  }
}

Steps to Reproduce

1. Set require_mention: true at group level
2. Set require_mention: false for a specific topic inside that group
3. Send a message in that topic without mentioning the bot
4. Bot does not respond

Expected Behavior

Topic-level require_mention: false should override group-level require_mention: true.
Bot responds to all messages in that topic without requiring a mention.

Actual Behavior

Bot ignores the topic-level setting and still requires a mention,
as if inheriting the group-level require_mention: true.

Additional Notes

• Setting require_mention: false at both group and topic level works correctly
• Bug only occurs when group and topic levels have conflicting values
• Docs state config lookup order is: Global → Wildcard → Group → Topic —
  topic should take highest priority but does not

Environment

• Channel: Telegram
• Chat type: Supergroup with Forum/Topics enabled
• GoClaw version: v2.13.0:full

Start by tracing the Telegram configuration lookup for group and topic require_mention values, using the documented Global → Wildcard → Group → Topic order as the reference. Verify with a conflicting group/topic case that false overrides true and the bot responds without a mention.