feat(config): add events section (session timeout + skip rule thresholds)

internal/config/config.go

@@ -16,6 +16,7 @@ type Config struct {
 	Auth     AuthConfig     `yaml:"auth"`
 	Library  LibraryConfig  `yaml:"library"`
 	Subsonic SubsonicConfig `yaml:"subsonic"`
+	Events   EventsConfig   `yaml:"events"`
 }
 
 type ServerConfig struct {
@@ -55,11 +56,23 @@ type SubsonicConfig struct {
 	AllowPlaintextPassword bool `yaml:"allow_plaintext_password"`
 }
 
+// EventsConfig governs play-event ingestion: session window, skip rule.
+type EventsConfig struct {
+	SessionTimeoutMinutes   int     `yaml:"session_timeout_minutes"`
+	SkipMaxCompletionRatio  float64 `yaml:"skip_max_completion_ratio"`
+	SkipMaxDurationPlayedMs int     `yaml:"skip_max_duration_played_ms"`
+}
+
 func Default() Config {
 	return Config{
 		Server:   ServerConfig{Address: ":4533"},
 		Database: DatabaseConfig{URL: ""},
 		Log:      LogConfig{Level: "info", Format: "text"},
+		Events: EventsConfig{
+			SessionTimeoutMinutes:   30,
+			SkipMaxCompletionRatio:  0.5,
+			SkipMaxDurationPlayedMs: 30000,
+		},
 	}
 }