fix(e2e): assert real prod metrics shape (object keyed by series, not array)

Batch A read run failed: /api/v1/resources/:id/metrics returns
{ok, data_source, metrics:{<name>:number[]}} (object keyed by metric name),
but the spec asserted Array.isArray(metrics). Assert the real shape: metrics
is a non-array object with >=1 named time-series array + a data_source.
Supersedes the conflicted #182.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: mastermanas805

e2e/live-reads.spec.ts

@@ -350,11 +350,18 @@ test.describe('LIVE — Batch A read flows (W-OBS / W-RES / W-VAULT / W-APIKEYS
       if (metrics.status() === STATUS_OK) {
         const m = await bodyJSON(metrics)
         expect(m.ok, 'metrics ok flag').toBe(true)
+        // Real prod shape: { ok, data_source, metrics: { <metricName>: number[] , ... } }
+        // (metrics is an OBJECT keyed by series name, not a top-level array).
         expect(
-          Array.isArray(m.metrics),
-          `metrics must carry a metrics[] series; got ${JSON.stringify(m).slice(0, 200)}.`,
+          m.metrics != null && typeof m.metrics === 'object' && !Array.isArray(m.metrics),
+          `metrics must be an object keyed by metric name; got ${JSON.stringify(m).slice(0, 200)}.`,
         ).toBe(true)
-        expect(m.window_seconds, 'metrics must echo the resolved window_seconds').toBeTruthy()
+        const series = Object.values(m.metrics ?? {})
+        expect(
+          series.length > 0 && Array.isArray(series[0]),
+          `metrics must carry at least one named time-series array; got ${JSON.stringify(m).slice(0, 200)}.`,
+        ).toBe(true)
+        expect(m.data_source, 'metrics must declare a data_source').toBeTruthy()
       }
 
       // ── Explicit DELETE assertion (W-RES formalizes the authed reap) ─────────