Migrate CLI E2E tests to Node.js 26

Run the CLI subprocess suites and benchmark tools as native TypeScript with
node:test, and move them under test/e2e-cli.

Update CI and Compose runners, run local smoke tests on Linux, macOS, and
Windows, and collect source-mapped CLI coverage with c8.

test/e2e-cli/run-compose-p2p.ts

@@ -0,0 +1,53 @@
+import { spawnProcess, type ProcessStatus } from "./helpers/process.ts";
+import { REPOSITORY_ROOT } from "./helpers/paths.ts";
+import { realpath } from "node:fs/promises";
+const repositoryRoot = await realpath(REPOSITORY_ROOT);
+const composeArgs = ["compose", "-f", "test/bench-network/compose.yml"];
+const p2pEnvironment = {
+    CLI_E2E_TASK: process.env.CLI_E2E_TASK ?? "test:p2p:ci",
+    RELAY: process.env.RELAY ?? "ws://nostr-relay:7777/",
+    PEERS_TIMEOUT: process.env.PEERS_TIMEOUT ?? "20",
+    SYNC_TIMEOUT: process.env.SYNC_TIMEOUT ?? "60",
+    LIVESYNC_USE_COTURN: process.env.LIVESYNC_USE_COTURN ?? "0",
+    TURN_SERVERS: process.env.TURN_SERVERS ?? "none",
+    LIVESYNC_P2P_PEERS_RETRY: process.env.LIVESYNC_P2P_PEERS_RETRY ?? "1",
+    LIVESYNC_P2P_RELAY_READY_TIMEOUT_MS: process.env.LIVESYNC_P2P_RELAY_READY_TIMEOUT_MS ?? "60000",
+    BENCH_LIVESYNC_TEST_TEE: process.env.BENCH_LIVESYNC_TEST_TEE ?? "0",
+    LIVESYNC_CLI_DEBUG: process.env.LIVESYNC_CLI_DEBUG ?? "0",
+    LIVESYNC_CLI_VERBOSE: process.env.LIVESYNC_CLI_VERBOSE ?? "0",
+};
+
+async function runDocker(args: string[], env?: Record<string, string>): Promise<ProcessStatus> {
+    return await spawnProcess("docker", {
+        args,
+        cwd: repositoryRoot,
+        env,
+        stdin: "inherit",
+        stdout: "inherit",
+        stderr: "inherit",
+    }).status;
+}
+
+let testStatus: ProcessStatus | undefined;
+try {
+    testStatus = await runDocker(
+        [...composeArgs, "run", "--build", "--rm", "bench-runner", "run-livesync-cli-e2e"],
+        p2pEnvironment
+    );
+} finally {
+    const cleanupStatus = await runDocker([...composeArgs, "down", "-v", "--remove-orphans"]);
+    if (!cleanupStatus.success) {
+        console.error(`[CLI E2E] Compose cleanup failed with exit code ${cleanupStatus.code}.`);
+        if (testStatus?.success) {
+            process.exit(cleanupStatus.code);
+        }
+    }
+}
+
+if (!testStatus?.success) {
+    const code = testStatus?.code ?? 1;
+    console.error(`[CLI E2E] Compose P2P suite failed with exit code ${code}.`);
+    process.exit(code);
+}
+
+console.log("\n[CLI E2E] Compose P2P suite passed.");