M9: bulk + duplicate + connection inheritance

- Bulk parameter sets on New-/Update-/Remove-InfisicalSecret via v3/secrets/batch/raw.
- Copy-InfisicalSecret cmdlet wrapping v4/secrets/duplicate.
- InfisicalCmdletBase.Resolve{ProjectId,Environment,SecretPath,ApiVersion,OrganizationId} with verbose inheritance logging.
- All resource cmdlets refactored to use the resolution helpers.
- InfisicalBulkSecretConverter for flexible Hashtable -> DTO mapping.
- 22 new unit tests covering registry, DTOs, converter, and inheritance helpers. Total: 161 passing.

src/PSInfisicalAPI.Tests/BulkSecretDtoTests.cs

@@ -0,0 +1,137 @@
+using System.Collections.Generic;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using Xunit;
+
+namespace PSInfisicalAPI.Tests
+{
+    public class BulkSecretDtoTests
+    {
+        private static readonly System.Reflection.Assembly ModuleAssembly =
+            typeof(PSInfisicalAPI.Connections.InfisicalConnection).Assembly;
+
+        private static object MakeDto(string typeName)
+        {
+            System.Type t = ModuleAssembly.GetType(typeName, true);
+            return System.Activator.CreateInstance(t);
+        }
+
+        [Fact]
+        public void BatchCreateItem_Serializes_With_Expected_Field_Names()
+        {
+            object item = MakeDto("PSInfisicalAPI.Secrets.InfisicalSecretBatchCreateItemDto");
+            item.GetType().GetProperty("SecretKey").SetValue(item, "API_KEY");
+            item.GetType().GetProperty("SecretValue").SetValue(item, "abc");
+
+            JObject json = JObject.Parse(JsonConvert.SerializeObject(item));
+            Assert.Equal("API_KEY", (string)json["secretKey"]);
+            Assert.Equal("abc", (string)json["secretValue"]);
+            Assert.False(json.ContainsKey("skipMultilineEncoding"));
+            Assert.False(json.ContainsKey("tagIds"));
+            Assert.False(json.ContainsKey("secretMetadata"));
+        }
+
+        [Fact]
+        public void BatchUpdateItem_Omits_Null_Optional_Fields()
+        {
+            object item = MakeDto("PSInfisicalAPI.Secrets.InfisicalSecretBatchUpdateItemDto");
+            item.GetType().GetProperty("SecretKey").SetValue(item, "API_KEY");
+            item.GetType().GetProperty("NewSecretName").SetValue(item, "RENAMED");
+
+            JObject json = JObject.Parse(JsonConvert.SerializeObject(item));
+            Assert.Equal("API_KEY", (string)json["secretKey"]);
+            Assert.Equal("RENAMED", (string)json["newSecretName"]);
+            Assert.False(json.ContainsKey("secretValue"));
+            Assert.False(json.ContainsKey("secretComment"));
+        }
+
+        [Fact]
+        public void BatchCreateRequest_Serializes_With_Expected_Envelope()
+        {
+            System.Type itemType = ModuleAssembly.GetType("PSInfisicalAPI.Secrets.InfisicalSecretBatchCreateItemDto", true);
+            object item = System.Activator.CreateInstance(itemType);
+            itemType.GetProperty("SecretKey").SetValue(item, "K1");
+            itemType.GetProperty("SecretValue").SetValue(item, "V1");
+
+            System.Type listType = typeof(List<>).MakeGenericType(itemType);
+            object list = System.Activator.CreateInstance(listType);
+            listType.GetMethod("Add").Invoke(list, new object[] { item });
+
+            object dto = MakeDto("PSInfisicalAPI.Secrets.InfisicalSecretBatchCreateRequestDto");
+            dto.GetType().GetProperty("WorkspaceId").SetValue(dto, "wks-1");
+            dto.GetType().GetProperty("Environment").SetValue(dto, "prod");
+            dto.GetType().GetProperty("SecretPath").SetValue(dto, "/db");
+            dto.GetType().GetProperty("Secrets").SetValue(dto, list);
+
+            JObject json = JObject.Parse(JsonConvert.SerializeObject(dto));
+            Assert.Equal("wks-1", (string)json["workspaceId"]);
+            Assert.Equal("prod", (string)json["environment"]);
+            Assert.Equal("/db", (string)json["secretPath"]);
+            JArray secrets = (JArray)json["secrets"];
+            Assert.Single(secrets);
+            Assert.Equal("K1", (string)secrets[0]["secretKey"]);
+            Assert.Equal("V1", (string)secrets[0]["secretValue"]);
+        }
+
+        [Fact]
+        public void BatchDeleteRequest_Serializes_With_Secret_Keys()
+        {
+            System.Type itemType = ModuleAssembly.GetType("PSInfisicalAPI.Secrets.InfisicalSecretBatchDeleteItemDto", true);
+            object item = System.Activator.CreateInstance(itemType);
+            itemType.GetProperty("SecretKey").SetValue(item, "K1");
+
+            System.Type listType = typeof(List<>).MakeGenericType(itemType);
+            object list = System.Activator.CreateInstance(listType);
+            listType.GetMethod("Add").Invoke(list, new object[] { item });
+
+            object dto = MakeDto("PSInfisicalAPI.Secrets.InfisicalSecretBatchDeleteRequestDto");
+            dto.GetType().GetProperty("WorkspaceId").SetValue(dto, "wks-1");
+            dto.GetType().GetProperty("Environment").SetValue(dto, "prod");
+            dto.GetType().GetProperty("Secrets").SetValue(dto, list);
+
+            JObject json = JObject.Parse(JsonConvert.SerializeObject(dto));
+            Assert.Equal("wks-1", (string)json["workspaceId"]);
+            JArray secrets = (JArray)json["secrets"];
+            Assert.Single(secrets);
+            Assert.Equal("K1", (string)secrets[0]["secretKey"]);
+        }
+
+        [Fact]
+        public void DuplicateRequest_Serializes_With_Expected_Field_Names()
+        {
+            object dto = MakeDto("PSInfisicalAPI.Secrets.InfisicalSecretDuplicateRequestDto");
+            dto.GetType().GetProperty("ProjectId").SetValue(dto, "wks-1");
+            dto.GetType().GetProperty("SourceEnvironment").SetValue(dto, "dev");
+            dto.GetType().GetProperty("DestinationEnvironment").SetValue(dto, "prod");
+            dto.GetType().GetProperty("SourceSecretPath").SetValue(dto, "/db");
+            dto.GetType().GetProperty("DestinationSecretPath").SetValue(dto, "/db");
+            dto.GetType().GetProperty("SecretIds").SetValue(dto, new[] { "id-1", "id-2" });
+            dto.GetType().GetProperty("OverwriteExisting").SetValue(dto, true);
+
+            JObject json = JObject.Parse(JsonConvert.SerializeObject(dto));
+            Assert.Equal("wks-1", (string)json["projectId"]);
+            Assert.Equal("dev", (string)json["sourceEnvironment"]);
+            Assert.Equal("prod", (string)json["destinationEnvironment"]);
+            Assert.Equal("/db", (string)json["sourceSecretPath"]);
+            Assert.Equal("/db", (string)json["destinationSecretPath"]);
+            Assert.True((bool)json["overwriteExisting"]);
+            JArray ids = (JArray)json["secretIds"];
+            Assert.Equal(2, ids.Count);
+            Assert.Equal("id-1", (string)ids[0]);
+            Assert.False(json.ContainsKey("attributesToCopy"));
+        }
+
+        [Fact]
+        public void DuplicateAttributes_Omits_Null_Toggles()
+        {
+            object attrs = MakeDto("PSInfisicalAPI.Secrets.InfisicalSecretDuplicateAttributesDto");
+            attrs.GetType().GetProperty("SecretValue").SetValue(attrs, true);
+
+            JObject json = JObject.Parse(JsonConvert.SerializeObject(attrs));
+            Assert.True((bool)json["secretValue"]);
+            Assert.False(json.ContainsKey("secretComment"));
+            Assert.False(json.ContainsKey("tags"));
+            Assert.False(json.ContainsKey("metadata"));
+        }
+    }
+}