Add getUsageStats operation + hook

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/operations/shot_simulation.gql

@@ -9,9 +9,6 @@ query GetTableState(
     useHomography: $useHomography
   ) {
     identifierToPosition
-    identifierToColor {
-      hex
-    }
   }
 }
 
@@ -21,9 +18,6 @@ query GetLiveTableState($videoId: Int!) {
     frameIndex
     tableState {
       identifierToPosition
-      identifierToColor {
-        hex
-      }
       homography {
         ...HomographyInfo
       }

src/operations/usage_stats.gql

@@ -1,17 +1,5 @@
 query getUsageStats($days: Int! = 30) {
   getUsageStats(days: $days) {
-    funnel {
-      freemiumEpoch
-      eraSignups
-      eraPaying
-      activationCohort
-      activationActivated
-      payingUsers
-      newPaid7d
-      newPaid30d
-      retentionPrevActive
-      retentionReturned
-    }
     totalUsers
     totalVideos
     totalShots

src/schema.gql

@@ -1170,7 +1170,6 @@ input CreatedAfter @oneOf {
 }
 
 type UsageStatsGQL {
-  funnel: FunnelStatsGQL!
   totalUsers: Int!
   totalVideos: Int!
   totalShots: Int!
@@ -1180,19 +1179,6 @@ type UsageStatsGQL {
   processingLast24h: [ProcessingStatusCountGQL!]!
 }
 
-type FunnelStatsGQL {
-  freemiumEpoch: Date!
-  eraSignups: Int!
-  eraPaying: Int!
-  activationCohort: Int!
-  activationActivated: Int!
-  payingUsers: Int!
-  newPaid7d: Int!
-  newPaid30d: Int!
-  retentionPrevActive: Int!
-  retentionReturned: Int!
-}
-
 type UsageStatsWindowGQL {
   label: String!
   newUsers: Int!