mesh-issues: a verdict naming issue 0 is none, and the tracker's own module is a registered owner (issue 396)

The model says 'no issue' as related to 0; the triage took that as an issue not
offered and failed the issue instead of triaging it.

modules/mesh-issues/cmd/mesh-issues/groom.go

@@ -407,6 +407,10 @@ func (t *Tracker) judge(is *Issue, candidates []*Issue) (*Verdict, error) {
 			}
 		}
 	}
+	if v.Verdict != VerdictNone && v.Issue == 0 {
+		// "related to issue 0" names no issue: the model's way of saying none. Not a failure, and nothing is linked.
+		v.Verdict = VerdictNone
+	}
 	switch v.Verdict {
 	case VerdictNone:
 		v.Issue, v.Certain = 0, false

modules/mesh-issues/cmd/mesh-issues/triage_test.go

@@ -808,3 +808,18 @@ func TestReadyIsSaidOnceFollowsDuplicatesAndAskingFailsLoudly(t *testing.T) {
 		t.Fatalf("not let go through the duplicate: %+v", v)
 	}
 }
+
+// A verdict of related or duplicate naming issue 0 names none: read as none, not a failure.
+func TestAVerdictNamingIssueZeroIsNone(t *testing.T) {
+	h := newHarness(t)
+	h.open(t, "the counter skips a number")
+	n := h.open(t, "the desk is slow")
+	withJudge(h, &stubJudge{verdict: map[string]any{"verdict": "related", "issue": 0, "reason": "nothing close"}})
+	if err := h.Check(n); err != nil {
+		t.Fatal(err)
+	}
+	is := get(t, h, n)
+	if is.Triage == nil || is.Triage.Verdict != VerdictNone || len(is.Links) != 0 || is.Severity != "minor" {
+		t.Fatalf("%+v", is)
+	}
+}