Track watch activity for scenes. (#3055)

* track watchtime and view time
* add view count sorting, added continue position filter
* display metrics in file info
* add toggle for tracking activity
* save activity every 10 seconds
* reset resume when video is nearly complete
* start from beginning when playing scene in queue

Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

graphql/schema/schema.graphql

@@ -177,6 +177,12 @@ type Mutation {
   """Resets the o-counter for a scene to 0. Returns the new value"""
   sceneResetO(id: ID!): Int!
 
+  """Sets the resume time point (if provided) and adds the provided duration to the scene's play duration"""
+  sceneSaveActivity(id: ID!, resume_time: Float, playDuration: Float): Boolean!
+
+  """Increments the play count for the scene. Returns the new play count value."""
+  sceneIncrementPlayCount(id: ID!): Int!
+
   """Generates screenshot at specified time in seconds. Leave empty to generate default screenshot"""
   sceneGenerateScreenshot(id: ID!, at: Float): String!