Enable duplicate output for RELOAD DICTIONARY in SYSTEM queries

Add RELOAD DICTIONARY to the list of SYSTEM commands that output
database/table identifiers twice in EXPLAIN AST format.

Author: claude

parser/parser.go

@@ -6777,7 +6777,8 @@ func (p *Parser) parseSystem() *ast.SystemQuery {
 	upperCmd := strings.ToUpper(sys.Command)
 	if strings.Contains(upperCmd, "STOP DISTRIBUTED SENDS") ||
 		strings.Contains(upperCmd, "START DISTRIBUTED SENDS") ||
-		strings.Contains(upperCmd, "FLUSH DISTRIBUTED") {
+		strings.Contains(upperCmd, "FLUSH DISTRIBUTED") ||
+		strings.Contains(upperCmd, "RELOAD DICTIONARY") {
 		// Only set duplicate if database and table are different (qualified name)
 		if sys.Database != sys.Table {
 			sys.DuplicateTableOutput = true

parser/testdata/01527_dist_sharding_key_dictGet_reload/metadata.json

@@ -1,6 +1 @@
-{
-  "explain_todo": {
-    "stmt13": true,
-    "stmt18": true
-  }
-}
+{}