feat: Jobs infrastructure, endpoints, UI and worker prioritization

src/Predictalytics.Infrastructure/Data/AppDbContext.cs

@@ -20,6 +20,7 @@ public class AppDbContext : DbContext
     public DbSet<MarketOutcomePriceSnapshot> MarketOutcomePriceSnapshots => Set<MarketOutcomePriceSnapshot>();
     public DbSet<TraderCategoryPerformance> TraderCategoryPerformances => Set<TraderCategoryPerformance>();
     public DbSet<TradeContext> TradeContexts => Set<TradeContext>();
+    public DbSet<BackgroundJob> BackgroundJobs => Set<BackgroundJob>();
 
     public AppDbContext(DbContextOptions<AppDbContext> options) : base(options) { }
 
@@ -220,5 +221,17 @@ public class AppDbContext : DbContext
             e.Property(ps => ps.Price).HasPrecision(10, 6);
             e.HasOne(ps => ps.MarketOutcome).WithMany().HasForeignKey(ps => ps.MarketOutcomeId).OnDelete(DeleteBehavior.Cascade);
         });
+
+        // BackgroundJob
+        mb.Entity<BackgroundJob>(e =>
+        {
+            e.HasKey(j => j.Id);
+            e.HasIndex(j => j.Status);
+            e.HasIndex(j => j.JobType);
+            e.Property(j => j.JobType).HasConversion<string>().HasMaxLength(64);
+            e.Property(j => j.Status).HasConversion<string>().HasMaxLength(64);
+            e.Property(j => j.ErrorMessage).HasMaxLength(4096);
+            e.HasOne(j => j.Trader).WithMany().HasForeignKey(j => j.TraderId).OnDelete(DeleteBehavior.SetNull);
+        });
     }
 }