Unmask `ClosedResourceError` handling in `._transport`

Unmask the CRE case block for peer-closed socket errors which already
had a TODO about reproducing the condition. It appears this case can
happen during inter-actor comms teardowns in `piker`, but i haven't been
able to figure out exactly what reproduces it yet..

So activate the block again for that 'socket already closed'-msg case,
and add a TODO questioning how to reproduce it.

(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code

tests/test_log_sys.py

@@ -4,7 +4,6 @@
 '''
 from pathlib import Path
 import shutil
-from types import ModuleType
 
 import pytest
 import tractor
@@ -58,32 +57,28 @@ def test_implicit_mod_name_applied_for_child(
     mod_code: str = (
         f'import tractor\n'
         f'\n'
-        # if you need to trace `testdir` stuff @ import-time..
-        # f'breakpoint()\n'
+        # f'breakpoint()\n'  # if you want to trace it all
         f'log = tractor.log.get_logger(pkg_name="{proj_name}")\n'
     )
 
     # create a sub-module for each pkg layer
     _lib = testdir.mkpydir(proj_name)
     pkg: Path = Path(_lib)
-    pkg_init_mod: Path = pkg / "__init__.py"
-    pkg_init_mod.write_text(mod_code)
-
     subpkg: Path = pkg / 'subpkg'
     subpkg.mkdir()
-    subpkgmod: Path = subpkg / "__init__.py"
-    subpkgmod.touch()
-    subpkgmod.write_text(mod_code)
+
+    pkgmod: Path = subpkg / "__init__.py"
+    pkgmod.touch()
 
     _submod: Path = testdir.makepyfile(
         _mod=mod_code,
     )
 
-    pkg_submod = pkg / 'mod.py'
+    pkg_mod = pkg / 'mod.py'
     pkg_subpkg_submod = subpkg / 'submod.py'
     shutil.copyfile(
         _submod,
-        pkg_submod,
+        pkg_mod,
     )
     shutil.copyfile(
         _submod,
@@ -96,11 +91,10 @@ def test_implicit_mod_name_applied_for_child(
     # XXX NOTE, once the "top level" pkg mod has been
     # imported, we can then use `import` syntax to
     # import it's sub-pkgs and modules.
-    subpkgmod: ModuleType = _code_load.load_module_from_path(
+    pkgmod = _code_load.load_module_from_path(
         Path(pkg / '__init__.py'),
         module_name=proj_name,
     )
-
     pkg_root_log = log.get_logger(
         pkg_name=proj_name,
         mk_sublog=False,
@@ -113,31 +107,16 @@ def test_implicit_mod_name_applied_for_child(
     # ^TODO! test this same output but created via a `get_logger()`
     # call in the `snakelib.__init__py`!!
 
-    # NOTE, the pkg-level "init mod" should of course
-    # have the same name as the package ns-path.
-    import snakelib as init_mod
-    assert init_mod.log.name == proj_name
-
-    # NOTE, a first-pkg-level sub-module should only
-    # use the package-name since the leaf-node-module
-    # will be included in log headers by default.
+    # a first-pkg-level module should only
+    # use
     from snakelib import mod
     assert mod.log.name == proj_name
 
-    from snakelib import subpkg
-    assert (
-        subpkg.log.name
-        ==
-        subpkg.__package__ 
-        ==
-        f'{proj_name}.subpkg'
-    )
-
     from snakelib.subpkg import submod
     assert (
         submod.log.name
         ==
-        submod.__package__ 
+        submod.__package__  # ?TODO, use this in `.get_logger()` instead?
         ==
         f'{proj_name}.subpkg'
     )
@@ -146,6 +125,8 @@ def test_implicit_mod_name_applied_for_child(
     assert len(sub_logs) == 1  # only one nested sub-pkg module
     assert submod.log.logger in sub_logs
 
+    # breakpoint()
+
 
 # TODO, moar tests against existing feats:
 # ------ - ------