Fix e2e history test: find result line in NDJSON output

The history command outputs multiple NDJSON lines (events + result +
completed status). Parse the line with type "result" instead of
assuming it's the first line.

Author: umair-ably

test/e2e/channels/channels-e2e.test.ts

@@ -342,11 +342,13 @@ describe("Channel E2E Tests", () => {
 
     let result;
     try {
-      // The --json output is NDJSON (result line + completed status line).
-      // Parse the first non-empty line which contains the result data.
-      // The last line is the completed status signal.
-      const line = historyResult.stdout.trim().split("\n").find(Boolean);
-      result = JSON.parse(line);
+      // The --json output is NDJSON: event lines, then a result line, then a completed status.
+      // Find the line with type "result" which contains the history data.
+      const lines = historyResult.stdout.trim().split("\n").filter(Boolean);
+      const resultLine = lines
+        .map((l) => JSON.parse(l))
+        .find((obj) => obj.type === "result");
+      result = resultLine;
     } catch (parseError) {
       throw new Error(
         `Failed to parse JSON history output. Parse error: ${String(parseError)}. Exit code: ${historyResult.exitCode}, Stderr: ${historyResult.stderr}, Stdout: ${historyResult.stdout}`,