[PM-26429] Add validation to policy data and metadata (#6460)

* Enhance PolicyRequestModel and SavePolicyRequest with validation for policy data and metadata.

* Add integration tests for policy updates to validate handling of invalid data types in PolicyRequestModel and SavePolicyRequest.

* Add missing using

* Update PolicyRequestModel for null safety by making Data and ValidateAndSerializePolicyData nullable

* Add integration tests for public PoliciesController to validate handling of invalid data types in policy updates.

* Add PolicyDataValidator class for validating and serializing policy data and metadata based on policy type.

* Refactor PolicyRequestModel, SavePolicyRequest, and PolicyUpdateRequestModel to utilize PolicyDataValidator for data validation and serialization, removing redundant methods and improving code clarity.

* Update PolicyRequestModel and SavePolicyRequest to initialize Data and Metadata properties with empty dictionaries.

* Refactor PolicyDataValidator to remove null checks for input data in validation methods

* Rename test methods in SavePolicyRequestTests to reflect handling of empty data and metadata, and remove null assignments in test cases for improved clarity.

* Enhance error handling in PolicyDataValidator to include field-specific details in BadRequestException messages.

* Enhance PoliciesControllerTests to verify error messages for BadRequest responses by checking for specific field names in the response content.

* refactor: Update PolicyRequestModel and SavePolicyRequest to use nullable dictionaries for Data and Metadata properties; enhance validation methods in PolicyDataValidator to handle null cases.

* test: Add integration tests for handling policies with null data in PoliciesController

* fix: Catch specific JsonException in PolicyDataValidator to improve error handling

* test: Add unit tests for PolicyDataValidator to validate and serialize policy data and metadata

* test: Update PolicyDataValidatorTests to validate organization data ownership metadata

test/Api.Test/AdminConsole/Models/Request/SavePolicyRequestTests.cs

@@ -54,7 +54,7 @@ public class SavePolicyRequestTests
     }
 
     [Theory, BitAutoData]
-    public async Task ToSavePolicyModelAsync_WithNullData_HandlesCorrectly(
+    public async Task ToSavePolicyModelAsync_WithEmptyData_HandlesCorrectly(
         Guid organizationId,
         Guid userId)
     {
@@ -68,10 +68,8 @@ public class SavePolicyRequestTests
             Policy = new PolicyRequestModel
             {
                 Type = PolicyType.SingleOrg,
-                Enabled = false,
-                Data = null
-            },
-            Metadata = null
+                Enabled = false
+            }
         };
 
         // Act
@@ -100,10 +98,8 @@ public class SavePolicyRequestTests
             Policy = new PolicyRequestModel
             {
                 Type = PolicyType.SingleOrg,
-                Enabled = false,
-                Data = null
-            },
-            Metadata = null
+                Enabled = false
+            }
         };
 
         // Act
@@ -133,8 +129,7 @@ public class SavePolicyRequestTests
             Policy = new PolicyRequestModel
             {
                 Type = PolicyType.OrganizationDataOwnership,
-                Enabled = true,
-                Data = null
+                Enabled = true
             },
             Metadata = new Dictionary<string, object>
             {
@@ -152,7 +147,7 @@ public class SavePolicyRequestTests
     }
 
     [Theory, BitAutoData]
-    public async Task ToSavePolicyModelAsync_OrganizationDataOwnership_WithNullMetadata_ReturnsEmptyMetadata(
+    public async Task ToSavePolicyModelAsync_OrganizationDataOwnership_WithEmptyMetadata_ReturnsEmptyMetadata(
         Guid organizationId,
         Guid userId)
     {
@@ -166,10 +161,8 @@ public class SavePolicyRequestTests
             Policy = new PolicyRequestModel
             {
                 Type = PolicyType.OrganizationDataOwnership,
-                Enabled = true,
-                Data = null
-            },
-            Metadata = null
+                Enabled = true
+            }
         };
 
         // Act
@@ -246,8 +239,7 @@ public class SavePolicyRequestTests
             Policy = new PolicyRequestModel
             {
                 Type = PolicyType.MaximumVaultTimeout,
-                Enabled = true,
-                Data = null
+                Enabled = true
             },
             Metadata = new Dictionary<string, object>
             {
@@ -280,8 +272,7 @@ public class SavePolicyRequestTests
             Policy = new PolicyRequestModel
             {
                 Type = PolicyType.OrganizationDataOwnership,
-                Enabled = true,
-                Data = null
+                Enabled = true
             },
             Metadata = errorDictionary
         };