Fix: Implement FixPlan part A9, A10, B

src/Predictalytics.Infrastructure/Data/Repositories/JobRepository.cs

@@ -52,4 +52,14 @@ public class JobRepository : IJobRepository
         _db.BackgroundJobs.Update(job);
         await _db.SaveChangesAsync(ct);
     }
+
+    public async Task ResetHungJobsAsync(CancellationToken ct = default)
+    {
+        var cutoff = DateTime.UtcNow.AddMinutes(-15);
+        await _db.BackgroundJobs
+            .Where(j => j.Status == JobStatus.InProgress && j.StartedAt < cutoff)
+            .ExecuteUpdateAsync(s => s
+                .SetProperty(j => j.Status, JobStatus.Pending)
+                .SetProperty(j => j.StartedAt, (DateTime?)null), ct);
+    }
 }

src/Predictalytics.Infrastructure/Data/Repositories/TradeRepository.cs

@@ -68,7 +68,7 @@ public class TradeRepository : ITradeRepository
                 t.TransactionHash = StringHelper.Truncate(t.TransactionHash, 66);
         }
 
-        foreach (var chunk in tradeList.Chunk(1000))
+        foreach (var chunk in tradeList.Chunk(500))
         {
             var sb = new System.Text.StringBuilder("INSERT IGNORE INTO Trades (PlatformTradeId, MarketId, AssetId, Outcome, Side, Price, Size, Amount, ExecutedAt, TransactionHash, TraderId, MarketOutcomeId, DbMarketId, Platform, IsContextEnriched) VALUES ");
             var parameters = new List<object>();
@@ -99,8 +99,37 @@ public class TradeRepository : ITradeRepository
                 parameters.Add(t.IsContextEnriched);
             }
             
-            var rowsInserted = await _db.Database.ExecuteSqlRawAsync(sb.ToString(), parameters.ToArray(), ct);
-            _logger.LogInformation("Inserted {RowsInserted} trades into the database.", rowsInserted);
+            int maxRetries = 3;
+            var backoffs = new[] { 250, 500, 1000 };
+            for (int retry = 0; retry <= maxRetries; retry++)
+            {
+                try
+                {
+                    var rowsInserted = await _db.Database.ExecuteSqlRawAsync(sb.ToString(), parameters.ToArray(), ct);
+                    _logger.LogInformation("Inserted {RowsInserted} trades into the database.", rowsInserted);
+                    break;
+                }
+                catch (Exception ex)
+                {
+                    var mysqlEx = ex as MySqlConnector.MySqlException ?? ex.InnerException as MySqlConnector.MySqlException;
+                    if (mysqlEx != null && (mysqlEx.Number == 1213 || mysqlEx.Number == 1205))
+                    {
+                        if (retry == maxRetries)
+                        {
+                            _logger.LogError(ex, "Failed to insert {Count} trades after {Retries} retries due to deadlocks.", chunk.Length, maxRetries);
+                        }
+                        else
+                        {
+                            _logger.LogWarning("Deadlock detected during trade insertion. Retrying in {Delay}ms... (Attempt {Attempt}/{Max})", backoffs[retry], retry + 1, maxRetries);
+                            await Task.Delay(backoffs[retry], ct);
+                        }
+                    }
+                    else
+                    {
+                        throw;
+                    }
+                }
+            }
         }
     }