fix: pin strawberry-graphql as temporary workaround

[mgogoulos]

This PR resolves the following issue that was introduced with the version strawberry-graphql 0.296.1

      backend │ [backend-migration]   File "/app/lib/python3.13/site-packages/graphql/type/schema.py", line 225, in __init__
      backend │ [backend-migration]     collect_referenced_types(query)
      backend │ [backend-migration]     ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^
      backend │ [backend-migration]   File "/app/lib/python3.13/site-packages/graphql/type/schema.py", line 436, in collect_referenced_types
      backend │ [backend-migration]     for field in named_type.fields.values():
      backend │ [backend-migration]                  ^^^^^^^^^^^^^^^^^
      backend │ [backend-migration]   File "/usr/local/lib/python3.13/functools.py", line 1025, in __get__
      backend │ [backend-migration]     val = self.func(instance)
      backend │ [backend-migration]   File "/app/lib/python3.13/site-packages/graphql/type/definition.py", line 837, in fields
      backend │ [backend-migration]     raise cls(f"{self.name} fields cannot be resolved. {error}") from error
      backend │ [backend-migration] TypeError: UserQuery fields cannot be resolved. name 'Info' is not defined