feat: update trigger_default_message

[helllllllder]

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feat:

What

• update trigger_default_message to verify if the default message is not an empty string
• verify if the message is from the contact before triggering the default message

Why

• To solve a bug where the contact where receiving a empty message back when sending messages in queue Empty queue default messages #268
• To solve a bug the messages from the bot(ougoing) where triggering the default message Outgoing(bot) messages triggering the default message #269