chore(server): 清理 stale code_batches 注释

server/internal/admin/types.go

@@ -60,7 +60,7 @@ type AuditFilter struct {
 	Offset int
 }
 
-// BatchSummary is a code_batches row with aggregate code counts for the
+// BatchSummary is a codes_batches row with aggregate code counts for the
 // batch list view.
 type BatchSummary struct {
 	ID        int64

server/internal/codes/admin_support.go

@@ -6,7 +6,7 @@ import (
 	"time"
 )
 
-// BatchInfo summarises a code_batches row with aggregate code counts, for the
+// BatchInfo summarises a codes_batches row with aggregate code counts, for the
 // admin batch-list view. It carries no plaintext — only hashes live in `codes`.
 type BatchInfo struct {
 	ID        int64