Mucking with custom `msgspec.Struct` codecs

Syncs with https://github.com/goodboy/tractor/pull/311
which is nowhere near ready and this approach didn't end up being
as straight forward as hoped. We're going to need a top level
`Msg`-boxing type/protocol in `tractor` first...

piker/_daemon.py

@@ -22,13 +22,13 @@ from typing import Optional, Union, Callable, Any
 from contextlib import asynccontextmanager as acm
 from collections import defaultdict
 
-from msgspec import Struct
 import tractor
 import trio
 from trio_typing import TaskStatus
 
 from .log import get_logger, get_console_log
 from .brokers import get_brokermod
+from .data.types import Struct
 
 
 log = get_logger(__name__)
@@ -204,6 +204,9 @@ async def open_piker_runtime(
     assert _services is None
 
     # XXX: this may open a root actor as well
+    with tractor.msg.configure_native_msgs(
+        [Struct],
+    ):
         async with (
             tractor.open_root_actor(
 
@@ -260,6 +263,10 @@ async def maybe_open_pikerd(
     if loglevel:
         get_console_log(loglevel)
 
+    # XXX: this may open a root actor as well
+    with tractor.msg.configure_native_msgs(
+        [Struct],
+    ):
         # subtle, we must have the runtime up here or portal lookup will fail
         async with maybe_open_runtime(loglevel, **kwargs):
 
@@ -442,7 +449,7 @@ async def spawn_brokerd(
     )
 
     # non-blocking setup of brokerd service nursery
-    from .data import _setup_persistent_brokerd
+    from .data.feed import _setup_persistent_brokerd
 
     await _services.start_service_task(
         dname,