Improve warning handling by logging instead of ignoring PendingModelChangesWarning

Co-authored-by: danielgerlag <[email protected]>

Author: Copilot

src/providers/WorkflowCore.Persistence.EntityFramework/Services/WorkflowDbContext.cs

@@ -57,10 +57,15 @@ protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
             base.OnConfiguring(optionsBuilder);
             optionsBuilder.UseQueryTrackingBehavior(QueryTrackingBehavior.NoTracking);
 
-            // Suppress pending model changes warning when using newer EF Core versions with older ModelSnapshots
-            // This prevents false positive warnings when the ProductVersion in ModelSnapshot differs from runtime
+            // Configure warning handling for PendingModelChangesWarning
+            // This warning can be triggered by:
+            // 1. ProductVersion mismatch (false positive when using EF Core 9.x with older snapshots)
+            // 2. Legitimate model changes that need migrations
+            // 
+            // We convert the warning to a log message so developers can still see it in logs
+            // but it won't throw an exception that prevents application startup
             optionsBuilder.ConfigureWarnings(warnings => 
-                warnings.Ignore(Microsoft.EntityFrameworkCore.Diagnostics.RelationalEventId.PendingModelChangesWarning));
+                warnings.Log(Microsoft.EntityFrameworkCore.Diagnostics.RelationalEventId.PendingModelChangesWarning));
         }
     }
 }