Plugin Development: Avoid recurring alerts of the same type

[gnongs]

• Related: #163

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Checklist

• [ ] New Feature for the Service/Plugin (Vatz)
• [x] Enhancement (Vatz)
• [ ] others(etc. e.g, documentation, project policy management)

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Is your feature request related to a problem? Please describe.

A clear and concise description of what the problem is. such as Ex. I'm always frustrated

Alert with the same content occur repeatedly.

Describe the solution you'd like| Ex

A clear and concise description of what you want to happen

Fix to prevent alerts for the same issue from continuing to occur.

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you have considered.

Manage messages as one variable for sending messages

Additional context or comment

Add any other context or screenshots about the feature request here.

[xellos00]

@gnongs We can close this issue, right?

[gnongs]

@xellos00 Yes! I will close this issue.