fix: address PR review — move memory limits to deploy block, handle swap-less hosts

Move mem_limit/memswap_limit to deploy.resources.limits.memory so the
constraint is actually enforced under Compose v3. Add END clause to
swap_mb() so hosts without a Swap line report 0 instead of empty output.
Fix test script header comment accuracy.

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

monitoring/scripts/homelab-audit.sh

@@ -90,7 +90,7 @@ zombie_parents() {
 }
 
 swap_mb() {
-  free | awk '\''/^Swap:/ {printf "%.0f", $3/1024}'\''
+  free | awk '\''/^Swap:/ {printf "%.0f", $3/1024; found=1} END {if (!found) print "0"}'\''
 }
 
 oom_events() {

monitoring/scripts/test-audit-collectors.sh

@@ -1,9 +1,8 @@
 #!/usr/bin/env bash
 # test-audit-collectors.sh — validates homelab-audit.sh collector output format
 #
-# Extracts each collector function from the audit script's COLLECTOR_SCRIPT
-# heredoc and runs it locally, checking that output matches the expected
-# key=value format. Exits non-zero on first failure.
+# Re-implements each collector function inline and runs it locally, checking
+# that output matches the expected format. Exits non-zero on any failure.
 
 set -euo pipefail
 

server-configs/ubuntu-manticore/docker-compose/tdarr/docker-compose.yml

@@ -26,8 +26,6 @@ services:
     container_name: tdarr-node
     init: true
     restart: unless-stopped
-    mem_limit: 28g
-    memswap_limit: 30g
     environment:
       - PUID=1000
       - PGID=1000
@@ -41,6 +39,8 @@ services:
       - /mnt/NV2/tdarr-cache:/temp
     deploy:
       resources:
+        limits:
+          memory: 28g
         reservations:
           devices:
             - driver: nvidia