[BUG] Permissions on artifacts

[fnikolai]

When we start the rest server on snowflake it returns the following error.

| ERROR:    Traceback (most recent call last):                                                                                                                                                                                               |
|   File "/home/superduper/.local/lib/python3.10/site-packages/starlette/routing.py", line 693, in lifespan                                                                                                                                  |
|     async with self.lifespan_context(app) as maybe_state:                                                                                                                                                                                  |
|   File "/usr/lib/python3.10/contextlib.py", line 199, in __aenter__                                                                                                                                                                        |
|     return await anext(self.gen)                                                                                                                                                                                                           |
|   File "/home/superduper/.local/lib/python3.10/site-packages/fastapi/routing.py", line 133, in merged_lifespan                                                                                                                             |
|     async with original_context(app) as maybe_original_state:                                                                                                                                                                              |
|   File "/home/superduper/.local/lib/python3.10/site-packages/starlette/routing.py", line 569, in __aenter__                                                                                                                                |
|     await self._router.startup()                                                                                                                                                                                                           |
|   File "/home/superduper/.local/lib/python3.10/site-packages/starlette/routing.py", line 670, in startup                                                                                                                                   |
|     await handler()                                                                                                                                                                                                                        |
|   File "/home/superduper/superduper_services/superduper_services/server/app.py", line 221, in startup_event                                                                                                                                |
|     self._startup(function=function, cfg=cfg)                                                                                                                                                                                              |
|   File "/home/superduper/superduper_services/superduper_services/server/app.py", line 183, in _startup                                                                                                                                     |
|     self._add_templates(temp_db)                                                                                                                                                                                                           |
|   File "/home/superduper/.local/lib/python3.10/site-packages/superduper/rest/base.py", line 206, in _add_templates                                                                                                                         |
|     db.apply(t, force=True)                                                                                                                                                                                                                |
|   File "/home/superduper/.local/lib/python3.10/site-packages/superduper/base/datalayer.py", line 456, in apply                                                                                                                             |
|     return apply.apply(                                                                                                                                                                                                                    |
|   File "/home/superduper/.local/lib/python3.10/site-packages/superduper/base/apply.py", line 47, in apply                                                                                                                                  |
|     object.pre_create(db)                                                                                                                                                                                                                  |
|   File "/home/superduper/.local/lib/python3.10/site-packages/superduper/components/component.py", line 576, in pre_create                                                                                                                  |
|     self._pre_create(db)                                                                                                                                                                                                                   |
|   File "/home/superduper/.local/lib/python3.10/site-packages/superduper/components/template.py", line 124, in _pre_create                                                                                                                  |
|     db.artifact_store.save_artifact(self.template)                                                                                                                                                                                         |
|   File "/home/superduper/.local/lib/python3.10/site-packages/superduper/backends/base/artifacts.py", line 119, in save_artifact                                                                                                            |
|     self.put_file(file_path, file_id=file_id)                                                                                                                                                                                              |
|   File "/home/superduper/.local/lib/python3.10/site-packages/superduper/backends/local/artifacts.py", line 119, in put_file                                                                                                                |
|     shutil.copy(file_path, save_path)                                                                                                                                                                                                      |
|   File "/usr/lib/python3.10/shutil.py", line 417, in copy                                                                                                                                                                                  |
|     copyfile(src, dst, follow_symlinks=follow_symlinks)                                                                                                                                                                                    |
|   File "/usr/lib/python3.10/shutil.py", line 256, in copyfile                                                                                                                                                                              |
|     with open(dst, 'wb') as fdst:                                                                                                                                                                                                          |
| PermissionError: [Errno 13] Permission denied: '/artifacts/9c9e4b89367007582586a03565c5b6b43f070f1f/demo.py'  

This probably originates from the default permissions of os.makedirs from https://github.com/superduper-io/superduper/blob/main/superduper/backends/local/artifacts.py.

https://www.geeksforgeeks.org/python-os-makedirs-method/

Instead of Oo777 try with O777

superduper@statefulset-0:/artifacts$ mkdir -p -m 0o777 testdir/nested
mkdir: invalid mode '0o777'
superduper@statefulset-0:/artifacts$ mkdir -p -m 0777 testdir/nested
superduper@statefulset-0:/artifacts$ ls -laR testdir/
testdir/:
total 12
drwxrwxrwx. 1 root root 4096 Dec  4 14:05 .
drwxrwxrwx. 1 root root 4096 Jan  1  1970 ..
drwxrwxrwx. 1 root root 4096 Dec  4 14:07 nested

testdir/nested:
total 8
drwxrwxrwx. 1 root root 4096 Dec  4 14:07 .
drwxrwxrwx. 1 root root 4096 Dec  4 14:05 ..
-rw-r--r--. 1 root root    0 Dec  4 14:08 a