Fix test name and use PR number for issue Index ordering

Co-authored-by: Malcolmnixon <1863707+Malcolmnixon@users.noreply.github.com>

Author: Copilot

src/DemaConsulting.BuildMark/RepoConnectors/GitHubRepoConnector.cs

@@ -189,6 +189,21 @@ public override async Task<List<ItemInfo>> GetChangesBetweenTagsAsync(Version? f
             }
         }
 
+        // Build a map from issue number to PR number for Index assignment
+        var issueToPrMap = new Dictionary<string, int>();
+        foreach (var (prNumber, _, _, prIssues) in prData)
+        {
+            var prNumberInt = int.Parse(prNumber);
+            foreach (var issueNumber in prIssues)
+            {
+                // Use the first PR that references this issue (smallest PR number)
+                if (!issueToPrMap.ContainsKey(issueNumber) || prNumberInt < issueToPrMap[issueNumber])
+                {
+                    issueToPrMap[issueNumber] = prNumberInt;
+                }
+            }
+        }
+
         // Second pass: batch fetch all issue details using issue list
         var issueDetailsMap = new Dictionary<string, ItemInfo>();
         if (issueNumbers.Count > 0)
@@ -238,15 +253,18 @@ public override async Task<List<ItemInfo>> GetChangesBetweenTagsAsync(Version? f
                         }
                     }
 
-                    issueDetailsMap[issueNumber] = new ItemInfo(issueNumber, issueTitle, issueUrl, issueType, int.Parse(issueNumber));
+                    // Use PR number as Index for ordering
+                    var index = issueToPrMap.TryGetValue(issueNumber, out var prNum) ? prNum : int.Parse(issueNumber);
+                    issueDetailsMap[issueNumber] = new ItemInfo(issueNumber, issueTitle, issueUrl, issueType, index);
                 }
             }
             catch (Exception)
             {
                 // If we can't fetch issue list, create fallback entries
                 foreach (var issueNumber in issueNumbers)
                 {
-                    issueDetailsMap[issueNumber] = new ItemInfo(issueNumber, $"Issue #{issueNumber}", string.Empty, "other", int.Parse(issueNumber));
+                    var index = issueToPrMap.TryGetValue(issueNumber, out var prNum) ? prNum : int.Parse(issueNumber);
+                    issueDetailsMap[issueNumber] = new ItemInfo(issueNumber, $"Issue #{issueNumber}", string.Empty, "other", index);
                 }
             }
         }

test/DemaConsulting.BuildMark.Tests/BuildInformationTests.cs

@@ -159,7 +159,7 @@ public async Task BuildInformation_CreateAsync_CollectsIssuesCorrectly()
     ///     Test that CreateAsync orders changes by Index (PR number).
     /// </summary>
     [TestMethod]
-    public async Task BuildInformation_CreateAsync_OrdersChangesChronologically()
+    public async Task BuildInformation_CreateAsync_OrdersChangesByIndex()
     {
         // Create build information for version with issues
         var connector = new MockRepoConnector();