chore(next): release 0.15.0

[github-actions]

🤖 I have created a release beep boop

0.15.0 (2026-09-14)

Features

• Add ability to snooze contacts instead of unsubscribing (787d200)
• Add ability to snooze contacts instead of unsubscribing (04dab0c)
• Add dedicated events for contact.subscribe and contact.unsubscribe (ab4a48b)
• Add improved tracking for unsubscribes and complaints (37626cb)
• Add sponsor link in navbar (32142c3)
• Archive campaigns (ea1fb5a)
• Delete account (93fa1bf)
• Use campaigns after cancel (541aca6)

Bug Fixes

• Correctly hide email verification banner if features is toggled off (9d3b600)
• Historical backfill of campaign data and improvements to handling (2211b25)
• Incrementation on send for stats (319cee9)
• Move Minio from Docker Hub to Quay (1df7bfb)
• Move Minio from Docker Hub to Quay (7215b5f)
• Remove lock_timeout from migration (df7afd8)
• workflows: validate template ownership (bb4f544)
• workflows: validate template ownership (9836930)

Code Refactoring

• Redesign domain settings for clearer and smoother setup (2e90539)

Documentation

• Add changelog page (641283b)

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