Update service filters for better discovery

- Add ark-permissions to exclusion list (maintenance service)
- Add sunshine to service_name_filters (game streaming server)
- Improves service discovery for game streaming infrastructure

agent/src/collectors/systemd.rs

@@ -153,6 +153,7 @@ impl SystemdCollector {
             "sshd@",
             "docker-prune",
             "docker-registry-gar",
+            "ark-permissions",
         ];
 
         // Define patterns for services we want to monitor (from legacy)
@@ -195,6 +196,7 @@ impl SystemdCollector {
             "backup",
             // Game servers
             "ark",
+            "sunshine",
         ];
 
         // Parse both unit files and loaded units