Add multi-server system monitor with agent/dashboard architecture

Single Flask codebase runs in agent mode (serves /api/stats from local
/proc) or dashboard mode (aggregates local + remote agents). Currently
monitors compute1 (64-core, podman container) and console (16-core,
bare systemd service).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

run.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+set -e
+
+cd ~/sysmon
+
+echo "Building sysmon container..."
+podman build -t sysmon .
+
+echo "Stopping existing container (if any)..."
+podman stop sysmon 2>/dev/null || true
+podman rm sysmon 2>/dev/null || true
+
+echo "Starting sysmon dashboard on port 8083..."
+podman run -d \
+  --name sysmon \
+  -p 8083:8083 \
+  --security-opt label=disable \
+  -v /proc:/host/proc:ro \
+  -e SYSMON_SERVERS="compute1:local,console:http://192.168.88.5:8083" \
+  --restart unless-stopped \
+  sysmon
+
+echo "Done. Dashboard at http://$(hostname):8083"