feat(prometheus): add metrics to Subsonic API and Plugins (#4266)

* Add prometheus metrics to subsonic and plugins

* address feedback, do not log error if operation is not supported

* add missing timestamp and client to stats

* remove .view from subsonic route

* directly inject DataStore in Prometheus, to avoid having to pass it in every call

Signed-off-by: Deluan <deluan@navidrome.org>

---------

Signed-off-by: Deluan <deluan@navidrome.org>
Co-authored-by: Deluan <deluan@navidrome.org>

plugins/adapter_scheduler_callback.go

@@ -9,22 +9,23 @@ import (
 )
 
 // newWasmSchedulerCallback creates a new adapter for a SchedulerCallback plugin
-func newWasmSchedulerCallback(wasmPath, pluginID string, runtime api.WazeroNewRuntime, mc wazero.ModuleConfig) WasmPlugin {
+func newWasmSchedulerCallback(wasmPath, pluginID string, m *Manager, runtime api.WazeroNewRuntime, mc wazero.ModuleConfig) WasmPlugin {
 	loader, err := api.NewSchedulerCallbackPlugin(context.Background(), api.WazeroRuntime(runtime), api.WazeroModuleConfig(mc))
 	if err != nil {
 		log.Error("Error creating scheduler callback plugin", "plugin", pluginID, "path", wasmPath, err)
 		return nil
 	}
 	return &wasmSchedulerCallback{
-		wasmBasePlugin: &wasmBasePlugin[api.SchedulerCallback, *api.SchedulerCallbackPlugin]{
-			wasmPath:   wasmPath,
-			id:         pluginID,
-			capability: CapabilitySchedulerCallback,
-			loader:     loader,
-			loadFunc: func(ctx context.Context, l *api.SchedulerCallbackPlugin, path string) (api.SchedulerCallback, error) {
+		wasmBasePlugin: newWasmBasePlugin[api.SchedulerCallback, *api.SchedulerCallbackPlugin](
+			wasmPath,
+			pluginID,
+			CapabilitySchedulerCallback,
+			m.metrics,
+			loader,
+			func(ctx context.Context, l *api.SchedulerCallbackPlugin, path string) (api.SchedulerCallback, error) {
 				return l.Load(ctx, path)
 			},
-		},
+		),
 	}
 }