Add log merge item allocators to alloc detail

The alloc iterator needs to find and include the totals of the avail and
freed allocator list heads in the log merge items.

Signed-off-by: Zach Brown <zab@versity.com>

kmod/src/format.h

@@ -325,6 +325,7 @@ struct scoutfs_alloc_root {
 #define SCOUTFS_ALLOC_OWNER_SERVER	1
 #define SCOUTFS_ALLOC_OWNER_MOUNT	2
 #define SCOUTFS_ALLOC_OWNER_SRCH	3
+#define SCOUTFS_ALLOC_OWNER_LOG_MERGE	4
 
 struct scoutfs_mounted_client_btree_val {
 	union scoutfs_inet_addr addr;