feat(sidecar): protocol 14 — the console command run forward (PLAN_REDESIGNS §16)

`POST /commands/run`, stamped `command.run` the way `world.call`,
`dt.start` and `gc.place` are (PROTOCOL.md §20.11). The plugin keeps the
key, fills {steamid} and {name} and decides who is online; the sidecar
moves the line and knows nothing of what a command does (D384, no
allowlist). Joins protocol 14, still unreleased on edge.

Stamp test: the body's key, commands and recipients pass through byte for
byte, placeholders and quotes included.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

sidecar/src/main.rs

@@ -208,6 +208,11 @@ use tracing_subscriber::EnvFilter;
 /// retry never places a second; the crate is kept when the run ends (D373). `gc.started`,
 /// `gc.ended` and `gc.failed` ride the feed like any other event.
 ///
+/// Console commands as event steps (§20.11, the module's PLAN_REDESIGNS.md §16) add one forward,
+/// `POST /commands/run`: the commands a step's author typed, run once or once per online
+/// recipient. The plugin remembers the key so nothing runs twice; this process keeps nothing and
+/// knows nothing of what a command does.
+///
 /// `docs/rust-link/PROTOCOL.md` is the specification — §8 the read path, §9 identity, §10 the
 /// mirror, §11 configuration, §12 clans, §13 the raid frame, §14 the leases, §15 the world verbs,
 /// §16 the rewards, §17 the map, §18 the optional mods, §19 the walk's fixes, §20 the step editor;