Updated processor/normalizer wiring to track Feedkit v0.7.0

internal/normalizers/builtins.go

@@ -16,22 +16,20 @@ import (
 //   - sources are built by name (cfg.Driver -> factory)
 //   - normalizers are selected by Match() (event.Schema -> first match wins)
 //
-// Registration order matters because feedkit normalize.Registry is “first match wins”.
+// Registration order matters because feedkit normalize.Processor is "first match wins".
 // In weatherfeeder we avoid ambiguity by matching strictly on schema constants, but
 // we still keep ordering stable as a best practice.
-//
-// If reg is nil, this function is a no-op.
-func RegisterBuiltins(reg *fknormalize.Registry) {
-	if reg == nil {
-		return
-	}
+func RegisterBuiltins(in []fknormalize.Normalizer) []fknormalize.Normalizer {
+	out := in
 
 	// Keep this intentionally boring: delegate registration to provider subpackages
 	// so main.go stays clean and each provider owns its own mapping logic.
 	//
 	// Order here should be stable across releases to reduce surprises when adding
 	// new normalizers.
-	nws.Register(reg)
-	openmeteo.Register(reg)
-	openweather.Register(reg)
+	out = nws.Register(out)
+	out = openmeteo.Register(out)
+	out = openweather.Register(out)
+
+	return out
 }