add CHANGELOG and withinnmof test

pkg/types/readsb/readsb_test.go

@@ -113,6 +113,24 @@ func TestWithinNMOf(t *testing.T) {
 	}
 }
 
+func TestAnyOR(t *testing.T) {
+	// Two non-overlapping 5 nm circles; Any should keep aircraft in either.
+	r := &AircraftReport{Aircraft: []Aircraft{
+		{Hex: "nearA", Lat: 40.01, Lon: -75.0},
+		{Hex: "nearB", Lat: 41.0, Lon: -76.01},
+		{Hex: "between", Lat: 40.5, Lon: -75.5},
+		{Hex: "nopos"},
+	}}
+	near := r.Filter(Any(WithinNMOf(40, -75, 5), WithinNMOf(41, -76, 5)))
+	got := map[string]bool{}
+	for _, a := range near {
+		got[a.Hex] = true
+	}
+	if !got["nearA"] || !got["nearB"] || got["between"] || got["nopos"] || len(got) != 2 {
+		t.Errorf("Any(WithinNMOf...) OR mismatch, matched: %v", got)
+	}
+}
+
 func TestAltBaroGround(t *testing.T) {
 	var a AltBaro
 	if err := json.Unmarshal([]byte(`"ground"`), &a); err != nil {