Sorting LiteLLM GitHub issues by difficulty to implement. Higher = harder.

{#31343 is harder because it spans cross-provider fallback behavior, tool-schema normalization, Agents SDK compatibility, and broader regression coverage; #28458 is more localized to the streaming interception path.}
https://github.com/berriai/litellm/issues/31343 3:2 https://github.com/berriai/litellm/issues/28458