the .deb ships no dign binary — documented `dign capsule fetch` is command-not-found on a package install

[MichaelTaylor3d]

Task

The .deb ships no dign binary. dpkg -L on a package install lists only /usr/bin/dig-node.

The verb exists — dig-node capsule fetch works — but every doc, runbook and issue that names dign capsule fetch is wrong for anyone who installed from the package rather than from source. A person following the documented command gets command not found and has no way to know the binary is simply named differently.

Evidence

Observed on a package install of dig-node 0.141.0 during the three-machine capsule-warm run (https://github.com/DIG-Network/dig_ecosystem/issues/3128). This is the shape of #857, still true at 0.141.0.

Context

Parent epic: https://github.com/DIG-Network/dig_ecosystem/issues/3128
Prior: https://github.com/DIG-Network/dig-node/issues/857

Scope

Either ship dign in the package (a symlink or a second bin target), or correct every doc that names it. Prefer shipping it: dign is the name used across docs.dig.net and the ecosystem's own issues, so renaming the documentation is the larger and more error-prone change.

Evidence bar

dpkg -L on a built package lists the dign path, asserted by the packaging test rather than by hand.