Update marshmallow requirement from <4 to <5 in /server (#724)

* Update marshmallow requirement from <4 to <5 in /server

Updates the requirements on [marshmallow](https://github.com/marshmallow-code/marshmallow) to permit the latest version.
- [Changelog](https://github.com/marshmallow-code/marshmallow/blob/dev/CHANGELOG.rst)
- [Commits](marshmallow-code/marshmallow@0.1.0...4.0.1)

---
updated-dependencies:
- dependency-name: marshmallow
  dependency-version: 4.0.1
  dependency-type: direct:production
...

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

* fix: update marshmallow-sqlalchemy to v1.4.0+ for marshmallow v4 compatibility

- Upgraded marshmallow-sqlalchemy from 0.30.0 to >=1.4.0
- Resolves AttributeError: module 'marshmallow' has no attribute '__version__'
- marshmallow-sqlalchemy v1.4.0+ supports both marshmallow v3 and v4
- All tests passing (26/26)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Tim Bradgate <timbradgate@hotmail.co.uk>
Co-authored-by: Claude <noreply@anthropic.com>

Author: 3 people

server/requirements.txt

@@ -2,10 +2,10 @@ tornado==6.5.2
 tornado-sqlalchemy==0.7.0
 datetime==4.9
 python-dateutil==2.9.0.post0
-marshmallow-sqlalchemy==0.30.0
+marshmallow-sqlalchemy>=1.4.0
 tornado-prometheus==0.1.2
 bcrypt==4.3.0
 anytree==2.13.0
 alembic==1.16.5
-marshmallow<4
+marshmallow<5
 pyjwt[crypto]==2.10.1