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/bench-network/Dockerfile.runner

@@ -1,14 +1,11 @@
 # syntax=docker/dockerfile:1
 
-FROM node:24-slim
+FROM node:26-slim
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends ca-certificates curl unzip python3 make g++ iproute2 libjpeg-turbo-progs time \
     && rm -rf /var/lib/apt/lists/*
 
-ENV DENO_INSTALL=/usr/local
-RUN curl -fsSL https://deno.land/install.sh | sh
-
 WORKDIR /workspace
 
 COPY package.json package-lock.json ./
@@ -20,22 +17,10 @@ RUN npm ci
 COPY . .
 RUN NODE_OPTIONS=--max-old-space-size=3072 LIVESYNC_CLI_TEST_SUPPORT=1 npm run build -w self-hosted-livesync-cli
 
-WORKDIR /workspace/src/apps/cli/testdeno
-
-RUN deno cache --lock=deno.lock \
-    bench-network-cases.ts \
-    bench-latency-sweep.ts \
-    bench-p2p-split-node.ts \
-    bench-p2p.ts \
-    bench-couchdb.ts \
-    bench-compression.ts \
-    test-p2p-sync.ts \
-    test-p2p-automatic-host.ts \
-    test-p2p-replicator-replacement.ts \
-    test-p2p-relay-disconnect.ts
+WORKDIR /workspace/test/e2e-cli
 
 COPY test/bench-network/run-bench.sh /usr/local/bin/run-livesync-bench
-COPY src/apps/cli/testdeno/run-cli-e2e.sh /usr/local/bin/run-livesync-cli-e2e
+COPY test/e2e-cli/run-cli-e2e.sh /usr/local/bin/run-livesync-cli-e2e
 RUN chmod +x /usr/local/bin/run-livesync-bench /usr/local/bin/run-livesync-cli-e2e
 
 CMD ["run-livesync-bench"]