Add litellm 1.82.3 source for GitHub-hosted installation

[pk-zipstack]

Summary

• Mirrors the quarantined litellm 1.82.3 PyPI package to enable installation via git+https from this Zipstack fork
• Repository URLs in pyproject.toml updated to point to Zipstack/litellm
• Package builds verified with uv build (both sdist and wheel)

Usage

After merging and tagging v1.82.3:

uv pip install litellm@git+https://github.com/Zipstack/litellm.git@v1.82.3

Or in pyproject.toml:

litellm = { git = "https://github.com/Zipstack/litellm.git", tag = "v1.82.3" }

Test plan

• uv build --sdist succeeds
• uv build --wheel succeeds
• After merge, tag v1.82.3 and verify uv pip install from GitHub works

🤖 Generated with Claude Code