v1.89.4

## Verify Docker Image Signature

All LiteLLM Docker images are signed with [cosign](https://docs.sigstore.dev/cosign/overview/). Every release is signed with the same key introduced in [commit `0112e53`](https://github.com/BerriAI/litellm/commit/0112e53046018d726492c814b3644b7d376029d0).

**Verify using the pinned commit hash (recommended):**

A commit hash is cryptographically immutable, so this is the strongest way to ensure you are using the original signing key:

```bash
cosign verify \
  --key https://raw.githubusercontent.com/BerriAI/litellm/0112e53046018d726492c814b3644b7d376029d0/cosign.pub \
  ghcr.io/berriai/litellm:v1.89.4
```

**Verify using the release tag (convenience):**

Tags are protected in this repository and resolve to the same key. This option is easier to read but relies on tag protection rules:

```bash
cosign verify \
  --key https://raw.githubusercontent.com/BerriAI/litellm/v1.89.4/cosign.pub \
  ghcr.io/berriai/litellm:v1.89.4
```

Expected output:

```
The following checks were performed on each of these signatures:
  - The cosign claims were validated
  - The signatures were verified against the specified public key
```

---
## What's Changed
* chore(release): backport #31029 to stable/1.89.x and cut 1.89.4 by @yuneng-berri in https://github.com/BerriAI/litellm/pull/31168
* chore(ui): rebuild dashboard artifacts for stable/1.89.x by @yuneng-berri in https://github.com/BerriAI/litellm/pull/31170
* chore(release): backport #30787, #30788, #31035, #31036, #31122, #31133 to stable/1.89.x (litellm-enterprise 0.1.42.post2) by @yuneng-berri in https://github.com/BerriAI/litellm/pull/31259


**Full Changelog**: https://github.com/BerriAI/litellm/compare/v1.89.3...v1.89.4