refactor: address code review findings across all projects

Apply comprehensive fixes from code reviews including:
- Extract shared utilities (SqlFormatHelper, CellValueConverter, DbDestinationBase)
- Add interface abstractions (IAuthenticationService, IDatabaseMigrator, IMisQueryBuilder)
- Implement SecureStore for encrypted secrets storage
- Fix error handling with proper HTTP status codes and logging
- Optimize double enumeration in DevEtlRegistry
- Add DataSync.Dev README for developer onboarding
- Extract filter panel base classes to reduce duplication
- Update code review docs to mark all issues as fixed

NEW/src/JdeScoping.Core/Models/Search/Search.cs

@@ -1,6 +1,7 @@
 using System.Text.Json;
 using System.Text.Json.Serialization;
 using JdeScoping.Core.Models.Enums;
+using Microsoft.Extensions.Logging;
 
 namespace JdeScoping.Core.Models.Search;
 
@@ -58,17 +59,8 @@ public class Search
     {
         get
         {
-            if (string.IsNullOrEmpty(CriteriaJson))
-                return null;
-
-            try
-            {
-                return JsonSerializer.Deserialize<SearchCriteria>(CriteriaJson);
-            }
-            catch
-            {
-                return null;
-            }
+            TryGetCriteria(out var criteria);
+            return criteria;
         }
         set
         {
@@ -78,6 +70,31 @@ public class Search
         }
     }
 
+    /// <summary>
+    /// Attempts to deserialize the search criteria from JSON.
+    /// </summary>
+    /// <param name="criteria">The deserialized criteria, or null if deserialization fails or JSON is empty.</param>
+    /// <param name="logger">Optional logger for warning on deserialization failures.</param>
+    /// <returns>True if deserialization succeeded or JSON was empty; false if deserialization failed.</returns>
+    public bool TryGetCriteria(out SearchCriteria? criteria, ILogger? logger = null)
+    {
+        criteria = null;
+
+        if (string.IsNullOrEmpty(CriteriaJson))
+            return true; // Empty is valid, not an error
+
+        try
+        {
+            criteria = JsonSerializer.Deserialize<SearchCriteria>(CriteriaJson);
+            return true;
+        }
+        catch (JsonException ex)
+        {
+            logger?.LogWarning(ex, "Failed to deserialize search criteria for Search ID {SearchId}", Id);
+            return false;
+        }
+    }
+
     /// <summary>
     /// Excel search results file (binary)
     /// </summary>