Hide `._entry`/`._child` frames, tweak some more type annots

tractor/_child.py

@@ -36,6 +36,7 @@ def parse_ipaddr(arg):
 
 
 if __name__ == "__main__":
+    __tracebackhide__: bool = True
 
     parser = argparse.ArgumentParser()
     parser.add_argument("--uid", type=parse_uid)

tractor/_entry.py

@@ -106,6 +106,7 @@ def _trio_main(
     Entry point for a `trio_run_in_process` subactor.
 
     '''
+    __tracebackhide__: bool = True
     _state._current_actor = actor
     trio_main = partial(
         async_main,

tractor/_spawn.py

@@ -503,7 +503,7 @@ async def trio_proc(
         })
 
         # track subactor in current nursery
-        curr_actor = current_actor()
+        curr_actor: Actor = current_actor()
         curr_actor._actoruid2nursery[subactor.uid] = actor_nursery
 
         # resume caller at next checkpoint now that child is up