Media Tags should support multiple user input

[CocoisBuggy]

I may have to come back and close this issue if I have mis-understood something - but I think tags currently do not have a source?

export interface EntityTag {
  _id: mongoose.Types.ObjectId
  targetId: MUUID
  type: number
  ancestors: string
  climbName?: string
  areaName: string
  lnglat?: Point
  topoData?: object
}

Media uploaded to the database should be manage-able by multiple users for this particular data-type. If someone uploads a photo of a crag, and then a new route is opened or someone comes along who can identify other routes, there should be a structured way to receive this auxiliary contribution.

I would suggest that tags need to be sourced based on who submitted them.

export interface EntityTag {
  /** The user who created this tag */
  owner: MUUID,
  /**
    users who want to contest the accuracy of a tag can flag it.
    this would not be the same as deletion - but could allow us to negatively weight tags by usefulness.
    A more fine-grained approach would be to have tags rated 0-5
    tagRating: { user: MUUID, rating: 0 | 1 | 2 | 3 | 5, }[]
   */  
  tagContest: MUUID[]
}