Read configuration outputs logs as well as configuration

When running `devcontainer read-configuration --include-merged-configuration --log-format json --workspace-folder ../workspace 2>/dev/null > server/configuration.json` as suggested in the example usage folder, it outputs logs in json format, then at the end, the JSON configuration. Similarly if I remove `--log-format json` .

Example output:
```json
{"type":"text","level":3,"timestamp":1724085707436,"text":"@devcontainers/cli 0.65.0. Node.js v20.14.0. darwin 24.1.0 arm64."}
{"type":"start","level":2,"timestamp":1724085707436,"text":"Run: git rev-parse --show-cdup"}
{"type":"stop","level":2,"timestamp":1724085707448,"text":"Run: git rev-parse --show-cdup","startTimestamp":1724085707436}
{"type":"start","level":2,"timestamp":1724085707449,"text":"Run: docker ps -q -a --filter label=devcontainer.local_folder=/DEVCONTAINER_CLI_PATH/workspace/.devcontainer/devcontainer.json"}
{"type":"stop","level":2,"timestamp":1724085707476,"text":"Run: docker ps -q -a --filter label=devcontainer.local_folder=/DEVCONTAINER_CLI_PATH/workspace/.devcontainer/devcontainer.json","startTimestamp":1724085707449}
{"type":"start","level":2,"timestamp":1724085707476,"text":"Run: docker inspect --type container a183f5305ed0"}
{"type":"stop","level":2,"timestamp":1724085707503,"text":"Run: docker inspect --type container a183f5305ed0","startTimestamp":1724085707476}
{"configuration":{"name":"devcontainer CLI Demo","build":{"dockerfile":"Dockerfile"},"customizations":{"vscode":{"extensions":["streetsidesoftware.code-spell-checker","mutantdino.resourcemonitor"],"settings":{"resmon.show.battery":false,"resmon.show.cpufreq":false}},"openvscodeserver":{"extensions":["streetsidesoftware.code-spell-checker"],"settings":{}}},"features":{"ghcr.io/devcontainers/features/go:1":{"version":"1.18.4"},"ghcr.io/devcontainers/features/node:1":{"version":"16.15.1","nodeGypDependencies":false},"ghcr.io/devcontainers/features/desktop-lite:1":{},"ghcr.io/devcontainers/features/docker-in-docker:2":{},"ghcr.io/devcontainers/features/sshd:1":{}},"appPort":["127.0.0.1:2222:2222",8000,6080],"remoteUser":"vscode","configFilePath":{"$mid":1,"fsPath":"/Users/tjs/Documents/.coding/open-source-repl/data/templates/workspace/.devcontainer/devcontainer.json","path":"/Users/tjs/Documents/.coding/open-source-repl/data/templates/workspace/.devcontainer/devcontainer.json","scheme":"vscode-fileHost"}},"workspace":{"workspaceFolder":"/workspaces/.coding/open-source-repl/data/templates/workspace","workspaceMount":"type=bind,source=/Users/tjs/Documents/.coding,target=/workspaces/.coding,consistency=consistent"},"mergedConfiguration":{"name":"devcontainer CLI Demo","build":{"dockerfile":"Dockerfile"},"features":{"ghcr.io/devcontainers/features/go:1":{"version":"1.18.4"},"ghcr.io/devcontainers/features/node:1":{"version":"16.15.1","nodeGypDependencies":false},"ghcr.io/devcontainers/features/desktop-lite:1":{},"ghcr.io/devcontainers/features/docker-in-docker:2":{},"ghcr.io/devcontainers/features/sshd:1":{}},"appPort":["127.0.0.1:2222:2222",8000,6080],"remoteUser":"vscode","configFilePath":{"$mid":1,"fsPath":"/Users/tjs/Documents/.coding/open-source-repl/data/templates/workspace/.devcontainer/devcontainer.json","path":"/Users/tjs/Documents/.coding/open-source-repl/data/templates/workspace/.devcontainer/devcontainer.json","scheme":"vscode-fileHost"},"init":true,"privileged":true,"capAdd":["SYS_PTRACE"],"securityOpt":["seccomp=unconfined"],"entrypoints":["/usr/local/share/desktop-init.sh","/usr/local/share/docker-init.sh","/usr/local/share/ssh-init.sh"],"mounts":[{"source":"dind-var-lib-docker-1r24dt41uav7vdhklt8d2bd3dnr3h8f1hftte0fss9ufcg2rom8j","target":"/var/lib/docker","type":"volume"}],"customizations":{"vscode":[{"extensions":["ms-azuretools.vscode-docker"]},{"extensions":["golang.Go"]},{"extensions":["dbaeumer.vscode-eslint"]},{"extensions":["streetsidesoftware.code-spell-checker","mutantdino.resourcemonitor"],"settings":{"resmon.show.battery":false,"resmon.show.cpufreq":false}}],"openvscodeserver":[{"extensions":["streetsidesoftware.code-spell-checker"],"settings":{}}]},"onCreateCommands":[],"updateContentCommands":[],"postCreateCommands":[],"postStartCommands":[],"postAttachCommands":[],"remoteEnv":{},"containerEnv":{},"portsAttributes":{}}}

```