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/operations/challenges.gql

@@ -0,0 +1,207 @@
+query GetChallenges {
+  challenges {
+    id
+    name
+    description
+    minimumShots
+    startDate
+    endDate
+    createdAt
+    updatedAt
+    requiredTableSize
+    requiredPocketSize
+    isPublic
+    maxAttempts
+    ruleSet {
+      id
+      name
+      description
+    }
+    createdBy {
+      id
+      username
+      profileImageUri
+    }
+  }
+}
+
+query GetChallenge($id: ID!) {
+  challenge(id: $id) {
+    id
+    name
+    description
+    minimumShots
+    startDate
+    endDate
+    createdAt
+    updatedAt
+    requiredTableSize
+    requiredPocketSize
+    isPublic
+    maxAttempts
+    ruleSet {
+      id
+      name
+      description
+    }
+    createdBy {
+      id
+      username
+      profileImageUri
+    }
+  }
+}
+
+query GetRuleSets {
+  ruleSets {
+    id
+    name
+    description
+  }
+}
+
+query GetChallengeLeaderboard($challengeId: ID!, $limit: Int) {
+  challengeLeaderboard(challengeId: $challengeId, limit: $limit) {
+    id
+    status
+    shotsCount
+    makesCount
+    makeRate
+    qualified
+    createdAt
+    user {
+      id
+      username
+      profileImageUri
+    }
+    video {
+      id
+      createdAt
+    }
+  }
+}
+
+query GetMyChallengeInvitations {
+  myChallengeInvitations {
+    id
+    status
+    createdAt
+    challenge {
+      id
+      name
+      description
+      startDate
+      endDate
+      createdBy {
+        id
+        username
+        profileImageUri
+      }
+    }
+    inviter {
+      id
+      username
+      profileImageUri
+    }
+  }
+}
+
+mutation CreateRuleSet($name: String!, $description: String) {
+  createRuleSet(name: $name, description: $description) {
+    id
+    name
+    description
+  }
+}
+
+mutation CreateChallenge(
+  $name: String!
+  $ruleSetId: ID!
+  $minimumShots: Int!
+  $startDate: DateTime!
+  $endDate: DateTime!
+  $description: String
+  $requiredTableSize: Float
+  $requiredPocketSize: Float
+  $isPublic: Boolean! = false
+  $maxAttempts: Int
+) {
+  createChallenge(
+    name: $name
+    ruleSetId: $ruleSetId
+    minimumShots: $minimumShots
+    startDate: $startDate
+    endDate: $endDate
+    description: $description
+    requiredTableSize: $requiredTableSize
+    requiredPocketSize: $requiredPocketSize
+    isPublic: $isPublic
+    maxAttempts: $maxAttempts
+  ) {
+    id
+    name
+    description
+    requiredTableSize
+    requiredPocketSize
+    isPublic
+    maxAttempts
+  }
+}
+
+mutation InviteUsersToChallenge($challengeId: ID!, $userIds: [ID!]!) {
+  inviteUsersToChallenge(challengeId: $challengeId, userIds: $userIds) {
+    id
+    status
+    inviter {
+      id
+      username
+    }
+  }
+}
+
+mutation RespondToChallengeInvitation($invitationId: ID!, $accept: Boolean!) {
+  respondToChallengeInvitation(invitationId: $invitationId, accept: $accept) {
+    id
+    status
+    challenge {
+      id
+    }
+  }
+}
+
+mutation StartChallenge($challengeId: ID!) {
+  startChallenge(challengeId: $challengeId) {
+    id
+    status
+    createdAt
+    challenge {
+      id
+      name
+    }
+  }
+}
+
+mutation SubmitChallengeEntry($entryId: ID!, $videoId: ID!) {
+  submitChallengeEntry(entryId: $entryId, videoId: $videoId) {
+    id
+    status
+    qualified
+    makeRate
+    shotsCount
+    makesCount
+    video {
+      id
+    }
+  }
+}
+
+mutation RecalculateChallengeEntry($entryId: ID!) {
+  recalculateChallengeEntry(entryId: $entryId) {
+    id
+    status
+    qualified
+    makeRate
+    shotsCount
+    makesCount
+  }
+}