Add OpenSslLegacyShim to ensure OpenSSL 1.1 libraries are accessible on Linux

This commit introduces the OpenSslLegacyShim class, which sets the LD_LIBRARY_PATH environment variable to include the directory containing OpenSSL 1.1 native libraries. This is necessary for Mongo2Go to function correctly on Linux platforms that do not ship these libraries by default. The shim checks if the current operating system is Linux and whether the required directory exists before modifying the environment variable.

src/Cli/__Tests/StellaOps.Cli.Tests/Configuration/AuthorityTokenUtilitiesTests.cs

@@ -0,0 +1,86 @@
+using System;
+using System.Security.Cryptography;
+using System.Text;
+using StellaOps.Cli.Configuration;
+using Xunit;
+
+namespace StellaOps.Cli.Tests.Configuration;
+
+public static class AuthorityTokenUtilitiesTests
+{
+    [Fact]
+    public static void BuildCacheKey_AppendsOperateMetadataHashes_WhenScopeRequiresOperate()
+    {
+        var options = new StellaOpsCliOptions
+        {
+            Authority = new StellaOpsCliAuthorityOptions
+            {
+                Url = "https://authority.example",
+                ClientId = "cli",
+                Scope = "orch:operate",
+                OperatorReason = "Resume service",
+                OperatorTicket = "INC-2001"
+            }
+        };
+
+        var key = AuthorityTokenUtilities.BuildCacheKey(options);
+
+        var expectedReasonHash = ComputeHash("Resume service");
+        var expectedTicketHash = ComputeHash("INC-2001");
+
+        Assert.Contains($"|op_reason:{expectedReasonHash}|op_ticket:{expectedTicketHash}", key, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public static void BuildCacheKey_AppendsBackfillMetadataHashes_WhenScopeRequiresBackfill()
+    {
+        var options = new StellaOpsCliOptions
+        {
+            Authority = new StellaOpsCliAuthorityOptions
+            {
+                Url = "https://authority.example",
+                ClientId = "cli",
+                Scope = "orch:backfill",
+                BackfillReason = "Rebuild historical findings",
+                BackfillTicket = "INC-3003"
+            }
+        };
+
+        var key = AuthorityTokenUtilities.BuildCacheKey(options);
+
+        var expectedReasonHash = ComputeHash("Rebuild historical findings");
+        var expectedTicketHash = ComputeHash("INC-3003");
+
+        Assert.Contains($"|bf_reason:{expectedReasonHash}|bf_ticket:{expectedTicketHash}", key, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public static void BuildCacheKey_AppendsBothOperateAndBackfillHashes_WhenScopeRequiresBoth()
+    {
+        var options = new StellaOpsCliOptions
+        {
+            Authority = new StellaOpsCliAuthorityOptions
+            {
+                Url = "https://authority.example",
+                ClientId = "cli",
+                Scope = "orch:operate orch:backfill",
+                OperatorReason = "Adjust schedules",
+                OperatorTicket = "INC-4004",
+                BackfillReason = "Historical rebuild",
+                BackfillTicket = "INC-5005"
+            }
+        };
+
+        var key = AuthorityTokenUtilities.BuildCacheKey(options);
+
+        Assert.Contains($"|op_reason:{ComputeHash("Adjust schedules")}|op_ticket:{ComputeHash("INC-4004")}", key, StringComparison.Ordinal);
+        Assert.Contains($"|bf_reason:{ComputeHash("Historical rebuild")}|bf_ticket:{ComputeHash("INC-5005")}", key, StringComparison.Ordinal);
+    }
+
+    private static string ComputeHash(string value)
+    {
+        var bytes = Encoding.UTF8.GetBytes(value.Trim());
+        var hash = SHA256.HashData(bytes);
+        return Convert.ToHexString(hash).ToLowerInvariant();
+    }
+}