Add get project version endpoint

[varmar05]

Add new public endpoint to get project version by its name, e.g.

GET /v1/project/version/11bb22d8-578f-448a-a06b-0c55b1a54285/v4
{
  "author": "member",
  "changes": {
    "added": [
      {
        "checksum": "a3a9ad153679116a50013e2a92d3fbfcc28040a0",
        "mtime": "2023-05-04T08:51:42.793089Z",
        "path": "test.txt",
        "size": 27
      }
    ],
    "removed": [],
    "updated": []
  },
  "changesets": {},
  "created": "2023-05-04T08:51:42Z",
  "name": "v4",
  "namespace": "my-workspace",
  "project_name": "test",
  "project_size": 27,
  "user_agent": "Mozilla/5.0"
}

plus ensure request for project with id is resilient to incorrect data type.

[harminius]

seems fine