Cleaned up documentation and removed stubs and TODOs throughout the application

config/config.go

@@ -101,7 +101,7 @@ func (cfg SourceConfig) ExpectedKinds() []string {
 // SinkConfig describes one output sink adapter.
 type SinkConfig struct {
 	Name   string         `yaml:"name"`
-	Driver string         `yaml:"driver"` // "stdout", "file", "postgres", "rabbitmq", ...
+	Driver string         `yaml:"driver"` // "stdout", "nats", "postgres", ...
 	Params map[string]any `yaml:"params"` // sink-specific settings
 }