fix(scheduler): читать снимки JSONB и показывать недоступные результаты

lib/scheduler-run-snapshot.test.ts

@@ -0,0 +1,22 @@
+import assert from "node:assert/strict"
+import { test } from "node:test"
+import { parseSchedulerRunSnapshot } from "./scheduler-run-snapshot"
+const snapshot = { v: 1, job: "backups", sampledAt: "2026-10-01T00:00:00Z", due: true, created: 2, failures: 0, pruned: 1, uploadFailures: 1, pruneFailures: 1, metadataError: "metadata unavailable", eventErrors: ["event unavailable"], errors: ["S3 unavailable"] }
+test("JSONB object and legacy JSON preserve the same snapshot and partial diagnostics", () => {
+  assert.deepEqual(parseSchedulerRunSnapshot(snapshot), snapshot)
+  assert.deepEqual(parseSchedulerRunSnapshot(JSON.stringify(snapshot)), snapshot)
+})
+test("missing, primitive, broken and future snapshots never throw or become valid empty data", () => {
+  for (const raw of [undefined, null, "", " ", "{", 1, false, [], "null", { ...snapshot, v: 2 }, { ...snapshot, job: "unknown" }, { ...snapshot, sampledAt: "bad" }]) assert.equal(parseSchedulerRunSnapshot(raw), null)
+})
+test("invalid backup counts, flags and diagnostic fields are rejected without zero substitution", () => {
+  for (const patch of [{ created: -1 }, { failures: "0" }, { pruned: 1.5 }, { created: undefined }, { due: undefined }, { skipped: "true" }, { errors: [{}] }, { eventErrors: [null] }, { metadataError: {} }, { uploadFailures: -1 }]) assert.equal(parseSchedulerRunSnapshot({ ...snapshot, ...patch }), null)
+})
+test("other collector envelopes support both representations and keep missing arrays unknown", () => {
+  for (const job of ["traffic", "uptime_resources", "servers_rest_ping", "uptime_ping", "uptime_speed"]) {
+    const key = job === "uptime_ping" ? "probes" : job === "uptime_speed" ? "runs" : "servers"
+    const value = { v: 1, job, sampledAt: snapshot.sampledAt, [key]: [] }
+    assert.deepEqual(parseSchedulerRunSnapshot(value), value); assert.deepEqual(parseSchedulerRunSnapshot(JSON.stringify(value)), value)
+    assert.equal(parseSchedulerRunSnapshot({ ...value, [key]: undefined }), null)
+  }
+})