Complete Records/Leaderboards + Time Trials systems (100%)

RECORDS & LEADERBOARDS (5/5 endpoints - 100%):
- Created LeaderboardsController with 5 endpoints
- GET /synergy/leaderboards/timetrials/{trialId}
- GET /synergy/leaderboards/career/{series}/{event}
- GET /synergy/leaderboards/global/top100
- GET /synergy/leaderboards/player/{synergyId}/records
- GET /synergy/leaderboards/compare/{synergyId1}/{synergyId2}

Added LeaderboardEntry and PersonalRecord models and database tables.
Migration applied: AddLeaderboardsAndRecords

Updated RewardsController.SubmitTimeTrial to track personal bests,
update leaderboards, and award 50 gold bonus for improvements.

Updated ProgressionController.CompleteCareerEvent similarly for
career event personal records.

TIME TRIALS (6/6 endpoints - 100%):
- GET /synergy/rewards/timetrials - List with time remaining
- GET /synergy/rewards/timetrials/{id} - Details with stats
- POST /synergy/rewards/timetrials/{id}/submit - Submit with PB tracking
- GET /synergy/rewards/timetrials/player/{synergyId}/results - History
- POST /synergy/rewards/timetrials/{id}/claim - Claim bonuses
- GET /synergy/leaderboards/timetrials/{id} - Leaderboards (above)

Added navigation properties to TimeTrialResult for easier queries.

Server progress: 66/73 endpoints (90%)
Two complete systems: Records/Leaderboards + Time Trials

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

RR3CommunityServer/Models/ApiModels.cs

@@ -40,6 +40,8 @@ public class CareerEventCompletion
     public string EventName { get; set; } = string.Empty;
     public int StarsEarned { get; set; } // 1-3 stars
     public double RaceTime { get; set; }
+    public string? TrackName { get; set; }
+    public string? CarName { get; set; }
 }
 
 // Standard Synergy API response wrapper
@@ -202,3 +204,127 @@ public class SaveDataResponse
     public long LastModified { get; set; }
     public bool Success { get; set; }
 }
+
+// ==================== LEADERBOARDS & RECORDS ====================
+
+public class LeaderboardEntry
+{
+    public int Id { get; set; }
+    public string SynergyId { get; set; } = string.Empty;
+    public string PlayerName { get; set; } = string.Empty;
+    
+    // What this record is for
+    public string RecordType { get; set; } = string.Empty; // "TimeTrial", "Career", "Multiplayer"
+    public string RecordCategory { get; set; } = string.Empty; // Time trial ID, series name, etc.
+    public string? TrackName { get; set; }
+    public string? CarName { get; set; }
+    
+    // The actual record
+    public double TimeSeconds { get; set; }
+    public DateTime SubmittedAt { get; set; }
+    
+    // Rankings (computed at query time)
+    public int? GlobalRank { get; set; }
+    public int? CountryRank { get; set; }
+}
+
+public class PersonalRecord
+{
+    public int Id { get; set; }
+    public string SynergyId { get; set; } = string.Empty;
+    
+    // What record this is
+    public string RecordType { get; set; } = string.Empty; // "TimeTrial", "Career"
+    public string RecordCategory { get; set; } = string.Empty; // Specific trial/event
+    public string? TrackName { get; set; }
+    public string? CarName { get; set; }
+    
+    // The record
+    public double BestTimeSeconds { get; set; }
+    public DateTime AchievedAt { get; set; }
+    public DateTime? PreviousBestTime { get; set; }
+    public double? ImprovementSeconds { get; set; }
+    
+    // Stats
+    public int TotalAttempts { get; set; }
+}
+
+public class LeaderboardResponse
+{
+    public string RecordType { get; set; } = string.Empty;
+    public string RecordCategory { get; set; } = string.Empty;
+    public int TotalEntries { get; set; }
+    public List<LeaderboardEntryDto> Entries { get; set; } = new();
+    public LeaderboardEntryDto? PlayerEntry { get; set; } // Requesting player's rank
+}
+
+public class LeaderboardEntryDto
+{
+    public int Rank { get; set; }
+    public string PlayerName { get; set; } = string.Empty;
+    public string SynergyId { get; set; } = string.Empty;
+    public double TimeSeconds { get; set; }
+    public string FormattedTime { get; set; } = string.Empty; // "1:23.456"
+    public DateTime SubmittedAt { get; set; }
+    public string? CarName { get; set; }
+    public bool IsCurrentPlayer { get; set; }
+}
+
+public class PersonalRecordsResponse
+{
+    public string SynergyId { get; set; } = string.Empty;
+    public string PlayerName { get; set; } = string.Empty;
+    public int TotalRecords { get; set; }
+    public List<PersonalRecordDto> TimeTrialRecords { get; set; } = new();
+    public List<PersonalRecordDto> CareerRecords { get; set; } = new();
+}
+
+public class PersonalRecordDto
+{
+    public string RecordCategory { get; set; } = string.Empty;
+    public string? TrackName { get; set; }
+    public string? CarName { get; set; }
+    public double BestTimeSeconds { get; set; }
+    public string FormattedTime { get; set; } = string.Empty;
+    public DateTime AchievedAt { get; set; }
+    public int TotalAttempts { get; set; }
+    public int GlobalRank { get; set; }
+    public double? ImprovementSeconds { get; set; }
+}
+
+public class RecordComparisonResponse
+{
+    public PlayerRecordSummary Player1 { get; set; } = new();
+    public PlayerRecordSummary Player2 { get; set; } = new();
+    public List<RecordComparison> Comparisons { get; set; } = new();
+}
+
+public class PlayerRecordSummary
+{
+    public string SynergyId { get; set; } = string.Empty;
+    public string PlayerName { get; set; } = string.Empty;
+    public int TotalRecords { get; set; }
+    public int BetterRecords { get; set; }
+}
+
+public class RecordComparison
+{
+    public string RecordCategory { get; set; } = string.Empty;
+    public string? TrackName { get; set; }
+    public double? Player1Time { get; set; }
+    public double? Player2Time { get; set; }
+    public string? Winner { get; set; } // "player1", "player2", "tie"
+    public double? TimeDifference { get; set; }
+}
+
+public class RecordSubmissionResponse
+{
+    public bool Success { get; set; }
+    public bool IsNewPersonalBest { get; set; }
+    public bool IsNewGlobalRecord { get; set; }
+    public int GlobalRank { get; set; }
+    public double? PreviousBestTime { get; set; }
+    public double? Improvement { get; set; }
+    public int GoldEarned { get; set; }
+    public int CashEarned { get; set; }
+}