fix(server): workspace policy was not loaded from db correctly

[rot1024]

Resolve the problem of the policy not working.

• The policy ID of workspaces is not loaded correctly from db due to an implementation omission in rearthx (common library)
• The workspace policy domain model is unique to Re:Earth and should not be included in reearthx, but was included, so it was fixed.

How to test: run locally and check GraphQL response. It returns a policy correctly.

[netlify]

✅ Deploy Preview for reearth-web canceled.

Name	Link
🔨 Latest commit	00caac6
🔍 Latest deploy log	https://app.netlify.com/sites/reearth-web/deploys/651d37266367ad000825a8c9

[codecov]

Codecov Report

Merging #721 (00caac6) into main (984e372) will increase coverage by 0.01%.
The diff coverage is 72.85%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #721      +/-   ##
==========================================
+ Coverage   26.70%   26.71%   +0.01%     
==========================================
  Files        1571     1573       +2     
  Lines      171358   171408      +50     
  Branches     3898     3898              
==========================================
+ Hits        45756    45796      +40     
- Misses     124513   124523      +10     
  Partials     1089     1089              

Flag	Coverage Δ
server	33.80% <72.85%> (+0.06%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
server/internal/adapter/gql/gqlmodel/workspace.go	64.15% <100.00%> (ø)
server/internal/infrastructure/memory/policy.go	90.47% <100.00%> (ø)
...r/internal/infrastructure/mongo/mongodoc/config.go	0.00% <ø> (ø)
server/internal/infrastructure/mongo/policy.go	80.76% <100.00%> (ø)
server/internal/usecase/interactor/layer.go	3.51% <ø> (ø)
server/internal/adapter/gql/loader.go	0.00% <0.00%> (ø)
server/internal/usecase/interactor/common.go	8.95% <0.00%> (-0.07%)	⬇️
server/internal/usecase/interactor/dataset.go	0.00% <0.00%> (ø)
...r/internal/infrastructure/mongo/mongodoc/policy.go	0.00% <0.00%> (ø)
server/internal/adapter/gql/loader_policy.go	0.00% <0.00%> (ø)
... and 2 more