cmds.posix.tar.CmdExtract: Log number of extracted files

Add a little log line at execution end, saying how many files were actually extracted.
Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/cmds/posix/tar/CmdExtract.py

@@ -10,6 +10,7 @@ from .Cmd import Cmd
 from ..CmdTar import CmdTar
 
 from ....lib.FileContext import FileContext
+from ....lib.log import *
 
 class CmdExtract(Cmd): # export
 
@@ -22,4 +23,5 @@ class CmdExtract(Cmd): # export
 
     async def _run(self, args: Namespace) -> None:
         async with self.ctx(dst=args.dst) as ctx:
-            await ctx.extract(ctx.dst.root)
+            paths = await ctx.extract(ctx.dst.root)
+            log(DEBUG, f'Extracted {len(paths)} files')