refactor: framework modules log through diary components

- Each module logs through diary.For(<package>): cabana, lagoon, attach, cooler, postcard, beachcomber, lighthouse, centrifugo, flare, phrasebook, wristband, bouncer
- App-published *slog.Logger overrides stay first; messages and attributes unchanged
- sunscreen: InstallDefault documented as the compatibility entry point; diary wraps every channel
- READMEs list diary as a dependency; logging docs: plugins use diary.For

modules/cabana/partial_render.go

@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"html/template"
-	"log/slog"
 	"net/http"
 	"reflect"
 	"strconv"
@@ -528,7 +527,7 @@ func (s *service) partial(w http.ResponseWriter, r *http.Request) {
 		tr := s.translator()
 		ctx := towel.WithLocale(r.Context(), schemaLocale(r.Context(), tr))
 		fail := func(reason string, err error) {
-			slog.Error("cabana: admin partial failed", "controller", controllerID(cc), "partial", name, "reason", reason, "error", err)
+			moduleLog.Error("cabana: admin partial failed", "controller", controllerID(cc), "partial", name, "reason", reason, "error", err)
 			WriteError(w, http.StatusInternalServerError, "error", msgServerError)
 		}
 		vm, err := provider.PartialData(ctx, name, record)