WIP: Add challenges feature schema and operations

- Add Challenge, ChallengeEntry, ChallengeInvitation, RuleSet types
- Add queries: challenges, challenge, challengeLeaderboard, myChallengeInvitations, myChallengeEntries, ruleSets
- Add mutations: createChallenge, createRuleSet, inviteUsersToChallenge, respondToChallengeInvitation, startChallenge, submitChallengeEntry, recalculateChallengeEntry

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/schema.gql

@@ -3,6 +3,12 @@ type Query {
     aggregateInput: AggregateInputGQL!
   ): [AggregateResultGQL!]!
   getBucketSet(keyName: String!): BucketSetGQL
+  challenges: [Challenge!]!
+  challenge(id: ID!): Challenge
+  challengeLeaderboard(challengeId: ID!, limit: Int! = 50): [ChallengeEntry!]!
+  myChallengeInvitations: [ChallengeInvitation!]!
+  ruleSets: [RuleSet!]!
+  myChallengeEntries: [ChallengeEntry!]!
   getDeployedConfig: DeployedConfigGQL!
   waitFor(duration: Float!): Float!
   getFeedVideos(
@@ -298,35 +304,60 @@ type BucketGQL {
   lowerBound: Float!
 }
 
-type DeployedConfigGQL {
-  allowNewUsers: Boolean!
-  firebase: Boolean!
-  devMode: Boolean!
-  environment: String!
-  minimumAllowedAppVersion: String!
-  subscriptionGatingEnabled: Boolean!
-  bannerMessages: [BannerGQL!]!
+type Challenge {
+  id: ID!
+  name: String!
+  description: String
+  minimumShots: Int!
+  requiredTableSize: Float
+  requiredPocketSize: Float
+  isPublic: Boolean!
+  maxAttempts: Int
+  startDate: DateTime!
+  endDate: DateTime!
+  createdAt: DateTime!
+  updatedAt: DateTime!
+  ruleSet: RuleSet!
+  createdBy: UserGQL!
 }
 
-type BannerGQL {
+type RuleSet {
+  id: ID!
+  name: String!
+  description: String
+  createdAt: DateTime!
+  updatedAt: DateTime!
+}
+
+type UserGQL {
   id: Int!
-  message: String!
-  color: String!
-  kind: BannerKindEnum!
-  dismissible: Boolean!
-  priority: Int!
+  firebaseUid: String
+  username: String!
+  isAdmin: Boolean
+  fargoRating: Int
+  activeVideoId: Int
+  stripeCustomerId: String
+  profileImageUri: String
+  createdAt: DateTime
+  updatedAt: DateTime
+  videosPrivateByDefault: Boolean
+  agreesToMarketing: Boolean
+  following: [UserGQL!]
+  followers: [UserGQL!]
+  isFollowedByCurrentUser: Boolean
 }
 
-enum BannerKindEnum {
-  INFO
-  WARNING
-  ERROR
-}
-
-type VideoHistoryGQL {
-  videos: [VideoGQL!]!
-  pageInfo: PageInfoGQL!
-  hasFollowing: Boolean!
+type ChallengeEntry {
+  id: ID!
+  status: String!
+  shotsCount: Int
+  makesCount: Int
+  makeRate: Float
+  qualified: Boolean
+  createdAt: DateTime!
+  challenge: Challenge!
+  video: VideoGQL
+  user: UserGQL!
 }
 
 type VideoGQL {
@@ -360,24 +391,6 @@ type VideoGQL {
   comments: [CommentGQL!]!
 }
 
-type UserGQL {
-  id: Int!
-  firebaseUid: String
-  username: String!
-  isAdmin: Boolean
-  fargoRating: Int
-  activeVideoId: Int
-  stripeCustomerId: String
-  profileImageUri: String
-  createdAt: DateTime
-  updatedAt: DateTime
-  videosPrivateByDefault: Boolean
-  agreesToMarketing: Boolean
-  following: [UserGQL!]
-  followers: [UserGQL!]
-  isFollowedByCurrentUser: Boolean
-}
-
 type ShotGQL {
   id: Int!
   videoId: Int!
@@ -633,6 +646,45 @@ type CommentGQL {
   replies: [CommentGQL!]!
 }
 
+type ChallengeInvitation {
+  id: ID!
+  status: String!
+  createdAt: DateTime!
+  challenge: Challenge!
+  inviter: UserGQL!
+}
+
+type DeployedConfigGQL {
+  allowNewUsers: Boolean!
+  firebase: Boolean!
+  devMode: Boolean!
+  environment: String!
+  minimumAllowedAppVersion: String!
+  subscriptionGatingEnabled: Boolean!
+  bannerMessages: [BannerGQL!]!
+}
+
+type BannerGQL {
+  id: Int!
+  message: String!
+  color: String!
+  kind: BannerKindEnum!
+  dismissible: Boolean!
+  priority: Int!
+}
+
+enum BannerKindEnum {
+  INFO
+  WARNING
+  ERROR
+}
+
+type VideoHistoryGQL {
+  videos: [VideoGQL!]!
+  pageInfo: PageInfoGQL!
+  hasFollowing: Boolean!
+}
+
 type PageInfoGQL {
   hasNextPage: Boolean!
   endCursor: String
@@ -940,6 +992,30 @@ scalar JSON
 
 type Mutation {
   createBucketSet(params: CreateBucketSetInput!): BucketSetGQL!
+  createRuleSet(name: String!, description: String = null): RuleSet!
+  createChallenge(
+    name: String!
+    ruleSetId: ID!
+    minimumShots: Int!
+    startDate: DateTime!
+    endDate: DateTime!
+    description: String = null
+    requiredTableSize: Float = null
+    requiredPocketSize: Float = null
+    isPublic: Boolean! = false
+    maxAttempts: Int = null
+  ): Challenge!
+  inviteUsersToChallenge(
+    challengeId: ID!
+    userIds: [ID!]!
+  ): [ChallengeInvitation!]!
+  respondToChallengeInvitation(
+    invitationId: ID!
+    accept: Boolean!
+  ): ChallengeInvitation!
+  startChallenge(challengeId: ID!): ChallengeEntry!
+  recalculateChallengeEntry(entryId: ID!): ChallengeEntry!
+  submitChallengeEntry(entryId: ID!, videoId: ID!): ChallengeEntry!
   setLoggerLevel(path: String!, level: String!): Boolean!
   reactToVideo(videoId: Int!, reaction: ReactionEnum): Boolean!
   commentOnVideo(