* refactor(#2384): leaf dispatch table + runCommand collapse (ADR-2346 P4)
Cutover all 55 remaining case arms from runCommand's switch to
HOST_COMMAND_ROUTERS. runCommand now contains only its default case
(~40 lines): the three-layer dispatch (capability → overlay → host table)
plus the unknown-command diagnostic. The 73-case switch is dissolved.
Each case body was relocated verbatim to a module-scope route*Command
function via a brace-matching extractor; inner break; statements (from
_dispatchNonFamily early-exit patterns) were converted to return;
(5 arms affected); loop break; statements preserved.
Closes#2384
* chore: retrigger CI
81f7ab4df1