Change user ID in database from int to 25char id

[sinamics]

Breaking Change
For security enhancements, particularly in REST API implementations, the following changes are introduced:

• Update userid type from int to a 25-character unique string.
• Relocated API key generation to user settings; now accessible to all users.
• A migration script is available. Ensure to backup data before applying updates. Release notes will contain a backup warning. https://github.com/sinamics/ztnet/blob/update_userid/prisma/seeds/update-user-id.ts

New REST API endpoints:

• GET User Networks
• POST New User Network
• Documentation updated