Add authentication for system_restore_post

[robin-nitrokey]

This patch fixes the API spec to add authentication to the POST /system/restore endpoint.

Fixes: #15

[robin-nitrokey]

@dvzrv Can you please test if this fixes your issue?

[jans23]

Shouldn't the OpenAPI spec be fixed in the original nethsm repo instead?

[robin-nitrokey]

@jans23 Yes, but this PR allows us to test the changes before it is fixed upstream.

[robin-nitrokey]

The corresponding NetHSM issue is:

• Issues with restore from backup for operational container nethsm#5

[dvzrv]

Without this change I get:

error: nethsm::Error - NetHSM API error: Restoring backup failed: Deseralization error (no message in body) (status code 401)

With this change I get:

error: nethsm::Error - NetHSM API error: Restoring backup failed: Body cannot be empty. (status code 400)

I am running restore against an "operational" container.

While the authentication error appears gone, I don't really know what to do about the 400, which is documented as

Bad request - restore did not apply.

[dvzrv]

I am also getting a 400 when trying to restore an "unprovisioned" container from backup.

[dvzrv]

Um, backup_file appears to be entirely unused in system_restore_post?!

[robin-nitrokey]

It looks like we missed the code path for multi-part requests when replacing reqwest with ureq in #1. Let’s handle that in a different issue: #20.

[ansiwen]

FWIW: we implemented multipart after we changed to ureq, but because we only used the Rust SDK for the PKCS#11 module, which doesn't handle restore or updates, we didn't care. 😉