Port all 16 internal import sites from re-exporting
via `piker.data._sharedmem` shim to importing core
shm types directly from `tractor.ipc._shm`.
Deats,
- `ShmArray` now imported from tractor in 10 files.
- `_Token` renamed to `NDToken` everywhere (5 files).
- `attach_shm_array` → `attach_shm_ndarray` at all
call sites.
- `data/__init__.py` sources `ShmArray`,
`get_shm_token` from tractor; keeps
`open/attach_shm_array` as public API aliases.
- Trim shim to only piker-specific wrappers:
`_make_token()`, `maybe_open_shm_array()`,
`try_read()`.
- Drop `Optional` usage in shim, use `|None`.
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Gud Boi
0a2059d00f