feat(cms): add recovery history and operational reliability tools

src/lib/error-group-query.test.ts

@@ -0,0 +1,45 @@
+import { expect, it } from "vitest";
+import { queryErrorGroups } from "./error-group-query";
+import { createErrorRecord } from "./error-monitor";
+
+const now = Date.parse("2026-09-09T12:00:00Z");
+const base = createErrorRecord("server", "save", "failed");
+it("filters occurrences by exact release before aggregating", () => {
+	const old = { ...base, release: "old", at: "2026-09-09T10:00:00Z" };
+	const fresh = { ...base, release: "new", at: "2026-09-09T11:00:00Z" };
+	expect(
+		queryErrorGroups([old, fresh], { release: "old" }, now)[0].events,
+	).toEqual([old]);
+});
+it("filters finite recent windows and sorts frequent groups first", () => {
+	const a = { ...base, fingerprint: "a", at: "2026-09-09T10:00:00Z" };
+	const b = { ...a, fingerprint: "b", at: "2026-09-09T11:00:00Z" };
+	const old = { ...a, at: "2026-09-01T10:00:00Z" };
+	expect(
+		queryErrorGroups(
+			[b, a, a, old],
+			{ period: "24h", sort: "frequency" },
+			now,
+		).map((g) => [g.fingerprint, g.events.length]),
+	).toEqual([
+		["a", 2],
+		["b", 1],
+	]);
+});
+it("uses latest group resolution while filtering historical releases", () => {
+	const old = {
+		...base,
+		release: "old",
+		at: "2026-09-08T10:00:00Z",
+		resolved: false,
+	};
+	const latest = {
+		...base,
+		release: "new",
+		at: "2026-09-09T11:00:00Z",
+		resolved: true,
+	};
+	expect(
+		queryErrorGroups([old, latest], { release: "old", status: "open" }, now),
+	).toHaveLength(0);
+});