num-traits inconsistently reported as unavailable

[chrysn]

Current Behavior

The view crates.io currently gives on num-traits is inconsistent:

• A cargo update just reported "Updating num-traits v0.2.16 -> v0.2.19" (although granted, that could have used data I already had on my machine from some days ago)
• A search (https://crates.io/search?q=num-traits) lists num-traits
• Following the search results to https://crates.io/crates/num-traits shows "🦀 num-traits: Crate not found" (although with an actual Ferris image, not just the emoji)
• Attempting to publish fails:

  
  Uploading coap-message v0.3.2 (/home/chrysn/git/crates/coap-message)
  error: failed to publish to registry at https://crates.io

Caused by: the remote server responded with an error (status 400 Bad Request): no known crate named num-traits

### Expected Behavior

If some version of the crate were yanked (or even all of them), I'd still expect to see that that happened -- and uploading should still be possible, especially (what I can't tell whether it's the case) if there is some (not necessarily latest) version matching my crate's requirements that has not been yanked.

### Steps To Reproduce

_No response_

### Environment

_No response_

### Anything else?

_No response_

[chrysn]

Uploading has gone back to normal after a brief "crates.io is currently in read-only mode for maintenance. Please try again later." message, and the website behaves normally again as well. Thanks for fixing this, and sorry if I created noise in what was already an ongoing maintenance operation.

[Turbo87]

I assume this was caused by the same issue as https://github.com/rust-lang/crates.io/issues/8685. sorry for the inconvenience 🙈