fix(api): показывать подтверждённые метрики OSPF

lib/ospf-cost.test.ts

@@ -12,6 +12,7 @@ test("neighbor cost is scoped to device, interface and area", () => {
 test("conflicting or invalid template costs do not choose a fabricated value", () => {
  const key = ospfCostKey(1,"ether1","0.0.0.0")
  assert.equal(buildOspfCostIndex([iface, iface]).get(key), 7)
+ assert.equal(buildOspfCostIndex([{ ...iface, cost: 0 }]).get(key), 0)
  assert.equal(buildOspfCostIndex([iface, { ...iface, cost: 42 }, iface]).get(key), null)
- for (const cost of [0, -1, 65536, 1.5]) assert.equal(buildOspfCostIndex([{ ...iface, cost }]).get(key), null)
+ for (const cost of [null, -1, 65536, 1.5]) assert.equal(buildOspfCostIndex([{ ...iface, cost }]).get(key), null)
 })