chore(deps): bump prisma from 6.19.0 to 7.4.0 in /backend

Bumps [prisma](https://github.com/prisma/prisma/tree/HEAD/packages/cli) from 6.19.0 to 7.4.0.
- [Release notes](https://github.com/prisma/prisma/releases)
- [Commits](https://github.com/prisma/prisma/commits/7.4.0/packages/cli)

---
updated-dependencies:
- dependency-name: prisma
  dependency-version: 7.4.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]