refactor(capture): CloseIssue carries a closing comment (#52)

#52's IssueTracker spec is CloseIssue(repo, number, comment). Refine the
#51 port signature to match and have the service pass the ticket body as
the closing comment (empty ⇒ close only). Keeps the close-with-comment
flow first-class rather than forcing two separate ticket items.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

ingestion/internal/capture/ports.go

@@ -63,7 +63,9 @@ type IssueRef struct {
 // scopes to owner "mathias"; the port deliberately omits owner.
 type IssueTracker interface {
 	CreateIssue(ctx context.Context, repo, title, body string) (IssueRef, error)
-	CloseIssue(ctx context.Context, repo string, number int) (IssueRef, error)
+	// CloseIssue closes an issue, optionally posting a closing comment
+	// first (empty comment ⇒ close only).
+	CloseIssue(ctx context.Context, repo string, number int, comment string) (IssueRef, error)
 	CommentIssue(ctx context.Context, repo string, number int, body string) (IssueRef, error)
 }
 

ingestion/internal/capture/service.go

@@ -222,7 +222,7 @@ func (s *Service) persistTicket(ctx context.Context, tk Ticket) (TicketResult, e
 	case "create":
 		ref, err = s.issues.CreateIssue(ctx, tk.Repo, tk.Title, tk.Body)
 	case "close":
-		ref, err = s.issues.CloseIssue(ctx, tk.Repo, tk.Number)
+		ref, err = s.issues.CloseIssue(ctx, tk.Repo, tk.Number, tk.Body)
 	case "comment":
 		ref, err = s.issues.CommentIssue(ctx, tk.Repo, tk.Number, tk.Body)
 	}

ingestion/internal/capture/service_test.go

@@ -69,7 +69,7 @@ func (f *fakeTracker) CreateIssue(_ context.Context, repo, title, _ string) (Iss
 	return IssueRef{Repo: repo, Number: 100 + len(f.created), URL: "https://git/" + repo + "/issues/x"}, nil
 }
 
-func (f *fakeTracker) CloseIssue(_ context.Context, repo string, number int) (IssueRef, error) {
+func (f *fakeTracker) CloseIssue(_ context.Context, repo string, number int, _ string) (IssueRef, error) {
 	if f.err != nil {
 		return IssueRef{}, f.err
 	}