Refactored the application structure to better separate concerns between files and packages

internal/adapters/inbound/httpapi/observations_endpoint.go

@@ -0,0 +1,28 @@
+// observations_endpoint.go defines the /observations endpoint behavior.
+// Layer: adapters/inbound/httpapi observation route.
+package httpapi
+
+import (
+	"context"
+
+	"gitea.maximumdirect.net/ejr/feedapi/endpoint"
+	"gitea.maximumdirect.net/ejr/feedapi/render"
+	"gitea.maximumdirect.net/ejr/feedapi/response"
+	"gitea.maximumdirect.net/ejr/weatherapi/internal/adapters/inbound/httpapi/presenter"
+)
+
+func observationDefinition(svc Service) endpoint.Definition {
+	return endpoint.GET(
+		"/observations",
+		bindQuery,
+		func(ctx context.Context, req queryRequest) (any, error) {
+			obs, err := svc.LatestObservation(ctx)
+			if err != nil {
+				return nil, err
+			}
+			return response.Envelope{Data: presenter.ObservationPayload(obs, req.Units)}, nil
+		},
+		endpoint.WithProduces(render.FormatJSON, render.FormatXML, render.FormatText),
+		endpoint.WithTemplate("observations.txt.tmpl"),
+	)
+}