remove rule metadata from atom

Signed-off-by: Arvindh <arvindh91@gmail.com>

re/atom.go

@@ -85,7 +85,6 @@ func ruleProjection(r Rule) atom.Resource {
 		OwnerID:   r.CreatedBy,
 		Status:    r.Status.String(),
 		Tags:      r.Tags,
-		Metadata:  map[string]any(r.Metadata),
 		CreatedBy: r.CreatedBy,
 		UpdatedBy: r.UpdatedBy,
 		CreatedAt: r.CreatedAt,
@@ -93,6 +92,5 @@ func ruleProjection(r Rule) atom.Resource {
 	})
 	res.Attributes["input_channel"] = r.InputChannel
 	res.Attributes["input_topic"] = r.InputTopic
-	res.Attributes["scheduled_at"] = r.Schedule.Time
 	return res
 }

re/atom_test.go

@@ -0,0 +1,41 @@
+// Copyright (c) Abstract Machines
+// SPDX-License-Identifier: Apache-2.0
+
+package re
+
+import (
+	"testing"
+	"time"
+
+	"github.com/absmach/magistrala/pkg/schedule"
+)
+
+func TestRuleProjectionOmitsMetadataAndSchedule(t *testing.T) {
+	got := ruleProjection(Rule{
+		ID:           "rule-1",
+		Name:         "high-temp",
+		DomainID:     "domain-1",
+		CreatedBy:    "user-1",
+		Status:       EnabledStatus,
+		Tags:         []string{"smoke"},
+		Metadata:     Metadata{"flow": "encoded-flow", "other": "value"},
+		InputChannel: "channel-1",
+		InputTopic:   "messages",
+		Schedule: schedule.Schedule{
+			Time: time.Date(2026, 6, 26, 17, 0, 0, 0, time.UTC),
+		},
+	})
+
+	if _, ok := got.Attributes["metadata"]; ok {
+		t.Fatalf("rule metadata should not be projected to Atom attributes: %+v", got.Attributes)
+	}
+	if _, ok := got.Attributes["scheduled_at"]; ok {
+		t.Fatalf("rule schedule should not be projected to Atom attributes: %+v", got.Attributes)
+	}
+	if got.Attributes["input_channel"] != "channel-1" {
+		t.Fatalf("unexpected input_channel: %+v", got.Attributes)
+	}
+	if got.Attributes["input_topic"] != "messages" {
+		t.Fatalf("unexpected input_topic: %+v", got.Attributes)
+	}
+}