Minor improvement to debug namespace

[digitalbase]

Before:

tsx debug.test.ts                                     
  ndk:pool:Main Connecting to 0 relays... +0ms
  ndk:outbox-pool Connecting to 2 relays... +0ms

After:

tsx debug.test.ts                                     
  ndk:pool:main Connecting to 0 relays... +0ms
  ndk:pool:outbox Connecting to 2 relays... +0ms

[pablof7z]

Code Review: Good concept, has merge conflicts

The namespace improvement is sensible — changing ndk:outbox-pool to ndk:pool:outbox and lowercasing pool names creates a more consistent debug namespace hierarchy.

However:

1. Merge conflicts — This PR conflicts with the current master branch and needs a rebase.
2. Import reformatting — The cosmetic changes to import spacing add noise. The meaningful changes are just ~4 lines.

@digitalbase Could you rebase this on master and remove the import formatting changes? The actual namespace fix is clean and we'd be happy to merge it.