cdn: disable health check loop and enable heap profiling

Remove check_health from the monitor loop to stop false-positive health
alerts. Add jemalloc heap profiling config to moq-relay service.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: kixelated

cdn/common/monitor.sh

@@ -122,7 +122,6 @@ check_health() {
 
 while true; do
 	check_memory
-	check_health
 
 	# Use memory backoff if alerting, otherwise check every 60s
 	if [[ "$MEMORY_STATE" == "alerting" ]]; then

cdn/relay/moq-relay.service.tftpl

@@ -10,6 +10,7 @@ User=root
 WorkingDirectory=/var/lib/moq
 Environment="RUST_LOG=info"
 Environment="RUST_BACKTRACE=1"
+Environment="MALLOC_CONF=prof:true,prof_active:true,prof_prefix:/tmp/moq-relay.heap"
 
 ExecStart=/var/lib/moq/pkg/bin/moq-relay \
   --listen [::]:443 \