fix(spans): Detect db_system redis

relay-event-normalization/src/normalize/span/description/mod.rs

@@ -57,7 +57,9 @@ pub(crate) fn scrub_span_description(
         .map(|op| op.split_once('.').unwrap_or((op, "")))
         .and_then(|(op, sub)| match (op, sub) {
             ("http", _) => scrub_http(description),
-            ("cache", _) | ("db", "redis") => scrub_redis_keys(description),
+            ("cache", _) | ("db", "redis") | ("db", _) if db_system == Some("redis") => {
+                scrub_redis_keys(description)
+            }
             ("db", sub) => {
                 if sub.contains("clickhouse")
                     || sub.contains("mongodb")
@@ -1124,6 +1126,24 @@ mod tests {
         assert_eq!(scrubbed.0.as_deref(), Some("SELECT a FROM b"));
     }
 
+    #[test]
+    fn redis_with_db_system() {
+        let json = r#"{
+            "description": "del myveryrandomkey:123Xalsdkxfhn",
+            "op": "db",
+            "data": {
+                "db.system": "redis"
+            }
+        }"#;
+
+        let mut span = Annotated::<Span>::from_json(json).unwrap();
+
+        let scrubbed = scrub_span_description(span.value_mut().as_mut().unwrap());
+
+        // NOTE: this should return `DEL *`, but we cannot detect lowercase command names yet.
+        assert_eq!(scrubbed.0.as_deref(), Some("*"));
+    }
+
     #[test]
     fn core_data() {
         let json = r#"{