Carry the power draw to the bar over the bus, not through a file (hq ADR 0260)

Modules talk over the bus. The power module's bundle puts each fresh reading of its own
sampler in its state draw, keyed by the machine; the bar's block shows that state, which
the bar's bundle watches under the read the mesh grants it. A new catalogue check refuses
a module naming another module's path under /run or /var/lib.

modules/power/files/bin/power-draw

@@ -1,12 +0,0 @@
-#!/bin/sh
-# power-draw (module power, novox/hq ADR 0255): the power the machine draws, for the bar's block.
-#
-# Prints the line the module's sampler (`power draw`, as root) publishes every five seconds, which says
-# what it measured: "machine" on battery, "CPU" or "CPU+GPU" otherwise. A line older than thirty
-# seconds is a sampler that stopped, and is not shown as if it were now.
-f="${MESH_POWER_DRAW:-/run/mesh-power/draw}"
-if [ -r "$f" ] && [ $(( $(date +%s) - $(stat -c %Y "$f") )) -le 30 ]; then
-	head -n 1 "$f"
-else
-	echo "power not measured"
-fi