feat(Notifications): Platform notifications for CLI and Dashboard

[0ski]

For human reviewer:

• Check if Redis connection + code makes sense
• Check CLI methods (it's on a hotpath)
• Check DB Migrations and new tables

✅ Checklist

• I have followed every step in the contributing guide
• The PR title follows the convention.
• I ran and tested the code works

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Testing

Spawning new CLI / Dashboard notifications, check MVP, check if failures not produce any problems with CLI/Dashboard

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Changelog

Added notifications mechanism for Dashboard and CLI

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Screenshots

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