chore(deps): update litellm requirement from <=1.82.6,>=1.82.4 to >=1.82.4,<=1.89.3

[dependabot]

Updates the requirements on litellm to permit the latest version.

Release notes

Sourced from litellm's releases.

v1.89.3

Verify Docker Image Signature

All LiteLLM Docker images are signed with cosign. Every release is signed with the same key introduced in commit 0112e53.

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:

cosign verify \
  --key https://raw.githubusercontent.com/BerriAI/litellm/0112e53046018d726492c814b3644b7d376029d0/cosign.pub \
  ghcr.io/berriai/litellm:v1.89.3

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:

cosign verify \
  --key https://raw.githubusercontent.com/BerriAI/litellm/v1.89.3/cosign.pub \
  ghcr.io/berriai/litellm:v1.89.3

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

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What's Changed

• chore(release): backport #30480, #30543, #30542, #30573 to stable/1.89.x and cut 1.89.3 by @​yuneng-berri in BerriAI/litellm#30888

Full Changelog: BerriAI/litellm@v1.89.2...v1.89.3

Commits

• 33df589 Merge pull request #30888 from BerriAI/litellm_backport_1_89_x_0620
• b4bf258 chore: refresh uv.lock for 1.89.3
• d596376 bump: version 1.89.2 → 1.89.3
• ccf892d fix(guardrails): return 400 not 500 when AIM blocks a request (#30573)
• 9683808 fix(guardrails): stop re-initializing DB guardrails on every poll (#30542)
• 3ab500c fix(guardrails): run pre_call hook once for model-level guardrails (#30543)
• 311be7f fix(integrations): cap Anthropic cache_control injection at 4 blocks (#30480)
• 94dae27 Merge pull request #30681 from BerriAI/litellm_backport_1_89_x_0617
• ad758c9 chore: refresh uv.lock for 1.89.2
• 01d3593 bump: version 1.89.1 → 1.89.2
• Additional commits viewable in compare view

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