HH-415: preserve binary frame and baseline semantics

Co-authored-by: multica-agent <github@multica.ai>

test/m0-spike.test.mjs

@@ -1,5 +1,6 @@
 import assert from "node:assert/strict";
 import { randomUUID } from "node:crypto";
+import { readFile } from "node:fs/promises";
 import test from "node:test";
 
 import {
@@ -60,6 +61,25 @@ test("WebSocket limits aggregate drops without payloads", () => {
   assert.deepEqual(dropped.dropped.reasons, { rate_limit: 2, frame_size_limit: 1, event_limit: 1 });
   assert.equal(dropped.dropped.count, 4);
   assert(!JSON.stringify(dropped).includes("YWJjZGVm"));
+
+  const binaryCollector = eventCollector("session-a", "target-a");
+  binaryCollector.listener("Network.webSocketFrameReceived", {
+    requestId: "ws-binary",
+    timestamp: 1,
+    response: { opcode: 2, payloadData: "AP8=" },
+  });
+  assert.deepEqual(binaryCollector.records[0], {
+    schema_version: "1.0",
+    session_id: "session-a",
+    target_id: "target-a",
+    kind: "websocket_frame",
+    connection_id: "ws-binary",
+    direction: "received",
+    opcode: 2,
+    payload_bytes: 4,
+    decoded_payload_bytes: 2,
+    payload: { state: "omitted", reason: "frame_policy" },
+  });
 });
 
 test("query and export isolate sessions before pagination", () => {
@@ -86,3 +106,10 @@ test("resource baseline summarizes repeated samples", () => {
     cpu_percent: { min: 10, max: 30, mean: 20, p95: 30 },
   });
 });
+
+test("fixed report retains every startup resource baseline", async () => {
+  const report = JSON.parse(await readFile(new URL("../artifacts/m0-report.json", import.meta.url), "utf8"));
+  assert(Array.isArray(report.resource_samples));
+  assert.deepEqual(report.resource_samples.map(({ sample }) => sample), [1, 2, 3]);
+  assert(report.resource_samples.every(({ resources }) => resources.sample_count > 1));
+});