Moved lookup tables into separate struct to fix some race conditions

Fixed lingering issues due to zero work size InodeFinish
Fixed xattrs not applying due to the keys sometimes not being
null-terminated.
Updated performance numbers

src/util/data.zig

@@ -6,9 +6,9 @@ const Writer = std.Io.Writer;
 const Limit = std.Io.Limit;
 
 const Archive = @import("../archive.zig");
-const FragEntry = Archive.FragEntry;
 const DecompFn = @import("../decomp.zig").DecompFn;
 const BlockSize = @import("../inode_data/file.zig").BlockSize;
+const FragEntry = @import("../tables.zig").FragEntry;
 const OffsetFile = @import("offset_file.zig");
 
 const DataReader = @This();