fix: 兼容最小权限数据库备份校验

ai_knowledge_base_v2/scripts/mysql_backup.sh

@@ -11,7 +11,14 @@ BACKUP_RETENTION_DAYS="${BACKUP_RETENTION_DAYS:-14}"
 
 command -v mysqldump >/dev/null || { echo "未找到 mysqldump" >&2; exit 1; }
 command -v gzip >/dev/null || { echo "未找到 gzip" >&2; exit 1; }
-command -v shasum >/dev/null || { echo "未找到 shasum" >&2; exit 1; }
+if command -v sha256sum >/dev/null; then
+  checksum_command=(sha256sum)
+elif command -v shasum >/dev/null; then
+  checksum_command=(shasum -a 256)
+else
+  echo "未找到 sha256sum 或 shasum" >&2
+  exit 1
+fi
 
 mkdir -p "$BACKUP_DIR"
 timestamp="$(date +%Y%m%d_%H%M%S)"
@@ -25,6 +32,7 @@ MYSQL_PWD="$MYSQL_PASSWORD" mysqldump \
   --user="$MYSQL_USER" \
   --single-transaction \
   --quick \
+  --no-tablespaces \
   --routines \
   --triggers \
   --events \
@@ -35,7 +43,7 @@ MYSQL_PWD="$MYSQL_PASSWORD" mysqldump \
 gzip -t "$temporary_file"
 test -s "$temporary_file"
 mv "$temporary_file" "$output_file"
-(cd "$(dirname "$output_file")" && shasum -a 256 "$(basename "$output_file")" > "$(basename "$output_file").sha256")
+(cd "$(dirname "$output_file")" && "${checksum_command[@]}" "$(basename "$output_file")" > "$(basename "$output_file").sha256")
 
 if [[ "$BACKUP_RETENTION_DAYS" =~ ^[0-9]+$ ]] && (( BACKUP_RETENTION_DAYS > 0 )); then
   find "$BACKUP_DIR" -type f \( -name "${MYSQL_DATABASE}_*.sql.gz" -o -name "${MYSQL_DATABASE}_*.sql.gz.sha256" \) \