Internal docs

How the module is put together, and how to operate a node built from it.

• Architecture – where the module sits in the stack and how much of it a given node mounts.

• Networks – logos.dev and logos.test, and how they differ.

• Running a node – Docker, prebuilt binaries or Nix.

• Querying a node – reading identity, version and metrics off a running node.

• Versioning – what a version bump means and how a release is cut.