fix(media): raise nofile ulimit to 65536 for *arr containers

sonarr/radarr/prowlarr/whisparr/bazarr were hitting the default Docker
nofile limit of 1024, causing EMFILE errors and excessive virtiofsd FD
churn on the /storage1 virtiofs mount.

stacks/media/docker-compose.yml

@@ -29,6 +29,8 @@ services:
     networks: [media, edge]
     env_file:
       - stack.env
+    ulimits:
+      nofile: { soft: 65536, hard: 65536 }
     volumes:
       - /etc/localtime:/etc/localtime:ro
       - /config/sonarr:/config
@@ -45,6 +47,8 @@ services:
     networks: [media, edge]
     env_file:
       - stack.env
+    ulimits:
+      nofile: { soft: 65536, hard: 65536 }
     volumes:
       - /etc/localtime:/etc/localtime:ro
       - /config/radarr:/config
@@ -60,6 +64,8 @@ services:
     networks: [media, edge]
     env_file:
       - stack.env
+    ulimits:
+      nofile: { soft: 65536, hard: 65536 }
     environment:
       - UMASK_SET=022
     volumes:
@@ -77,6 +83,8 @@ services:
     networks: [media, edge]
     env_file:
       - stack.env
+    ulimits:
+      nofile: { soft: 65536, hard: 65536 }
     environment:
       - UMASK=002
     volumes:
@@ -137,6 +145,8 @@ services:
     networks: [media, edge]
     env_file:
       - stack.env
+    ulimits:
+      nofile: { soft: 65536, hard: 65536 }
     environment:
       - UMASK=002
       - WEBUI_PORTS=6969/tcp