Max Johnson 41f15bf07b app-server: add JSON tracing logs (#12287) ...

- add `LOG_FORMAT=json` support for app-server tracing logs via
`tracing_subscriber`'s built-in JSON formatter
- keep the default human-readable format unchanged and keep `RUST_LOG`
filtering behavior
- document the env var and update lockfile

2026-02-20 10:10:51 -08:00

1.1 MiB

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