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/BulkSecretConverterTests.cs

@@ -0,0 +1,96 @@
+using System.Collections;
+using PSInfisicalAPI.Errors;
+using PSInfisicalAPI.Secrets;
+using Xunit;
+
+namespace PSInfisicalAPI.Tests
+{
+    public class BulkSecretConverterTests
+    {
+        [Fact]
+        public void ToCreateItems_Maps_Standard_Keys()
+        {
+            Hashtable entry = new Hashtable
+            {
+                { "SecretName", "API_KEY" },
+                { "SecretValue", "abc" },
+                { "SecretComment", "primary" },
+                { "SkipMultilineEncoding", true },
+                { "TagIds", new[] { "tag-1", "tag-2" } }
+            };
+
+            InfisicalBulkCreateSecretItem[] items = InfisicalBulkSecretConverter.ToCreateItems(new[] { entry });
+            Assert.Single(items);
+            Assert.Equal("API_KEY", items[0].SecretName);
+            Assert.Equal("abc", items[0].SecretValue);
+            Assert.Equal("primary", items[0].SecretComment);
+            Assert.True(items[0].SkipMultilineEncoding);
+            Assert.Equal(new[] { "tag-1", "tag-2" }, items[0].TagIds);
+        }
+
+        [Fact]
+        public void ToCreateItems_Accepts_Name_Alias_For_SecretName()
+        {
+            Hashtable entry = new Hashtable
+            {
+                { "Name", "API_KEY" },
+                { "Value", "abc" }
+            };
+
+            InfisicalBulkCreateSecretItem[] items = InfisicalBulkSecretConverter.ToCreateItems(new[] { entry });
+            Assert.Single(items);
+            Assert.Equal("API_KEY", items[0].SecretName);
+            Assert.Equal("abc", items[0].SecretValue);
+        }
+
+        [Fact]
+        public void ToCreateItems_Without_SecretName_Throws()
+        {
+            Hashtable entry = new Hashtable { { "Value", "abc" } };
+
+            Assert.Throws<InfisicalConfigurationException>(() =>
+                InfisicalBulkSecretConverter.ToCreateItems(new[] { entry }));
+        }
+
+        [Fact]
+        public void ToUpdateItems_Maps_NewSecretName()
+        {
+            Hashtable entry = new Hashtable
+            {
+                { "SecretName", "API_KEY" },
+                { "NewSecretName", "RENAMED" },
+                { "SecretValue", "new-value" }
+            };
+
+            InfisicalBulkUpdateSecretItem[] items = InfisicalBulkSecretConverter.ToUpdateItems(new[] { entry });
+            Assert.Single(items);
+            Assert.Equal("API_KEY", items[0].SecretName);
+            Assert.Equal("RENAMED", items[0].NewSecretName);
+            Assert.Equal("new-value", items[0].SecretValue);
+        }
+
+        [Fact]
+        public void ToCreateItems_Maps_Metadata_Dictionary()
+        {
+            Hashtable meta = new Hashtable { { "owner", "platform" }, { "tier", "1" } };
+            Hashtable entry = new Hashtable
+            {
+                { "SecretName", "API_KEY" },
+                { "SecretValue", "abc" },
+                { "Metadata", meta }
+            };
+
+            InfisicalBulkCreateSecretItem[] items = InfisicalBulkSecretConverter.ToCreateItems(new[] { entry });
+            Assert.NotNull(items[0].SecretMetadata);
+            Assert.Equal("platform", items[0].SecretMetadata["owner"]);
+            Assert.Equal("1", items[0].SecretMetadata["tier"]);
+        }
+
+        [Fact]
+        public void ToCreateItems_Empty_Input_Returns_Empty()
+        {
+            InfisicalBulkCreateSecretItem[] items = InfisicalBulkSecretConverter.ToCreateItems(null);
+            Assert.Empty(items);
+        }
+    }
+}