Address hierarchy review nits

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: zwick

pkg/github/issues_test.go

@@ -635,7 +635,7 @@ func Test_GetIssue_HierarchyEnrichment(t *testing.T) {
 		{
 			name:    "has_children is false when total is zero even with completed nonzero",
 			parent:  nil,
-			summary: map[string]any{"total": 0, "completed": 0, "percentCompleted": 0},
+			summary: map[string]any{"total": 0, "completed": 1, "percentCompleted": 0},
 			assertResponse: func(t *testing.T, issue MinimalIssue) {
 				assert.Equal(t, github.Ptr(false), issue.HasChildren)
 				assert.Nil(t, issue.SubIssuesSummary)

pkg/github/minimal_types.go

@@ -354,7 +354,7 @@ type MinimalIssue struct {
 }
 
 // MinimalIssueRef is a compact reference to a related issue (e.g. a parent issue).
-// Its keys mirror the get_parent (GetIssueParent) payload so both surfaces agree.
+// Its keys mirror the get_parent (GetIssueParent) response shape.
 type MinimalIssueRef struct {
 	Number     int    `json:"number"`
 	Title      string `json:"title"`