Merge branch 'release-2.6.27a1'

fix BaseType annotation check (stanfordnlp#8318)

Revert hotpotqa back to original (from stanfordnlp#8234) as it's now …

…alive (stanfordnlp#8317)

add deps to testing before pypi (stanfordnlp#8308)

remove duplicated callback field (stanfordnlp#8230)

Reduce default LM retries to 3

Improve handling of literals and optionals (stanfordnlp#8143)

Make Adapters' parse_value and Cache's request_cache more permissive (s…

…tanfordnlp#8132)

Add `dspy.Tool.from_mcp_tool` (stanfordnlp#8130)

* Add util for using mcp tools as DSPy tools

Co-authored-by: ThanabordeeN <[email protected]>

* rename

* update dependency

* add from_mcp_tool

* fix circular import

* test fix

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Co-authored-by: ThanabordeeN <[email protected]>

Dspy fanout cache (stanfordnlp#8062)

* init

* increment

* add test

* remove old cache code

* rename fanout_cache to disk_cache

* add testing

* fix tests

* add cache for colbert

* fix tests

* increase timeout to 10s

* change default value

* cache embedding

* fallback to litellm cache for embedding call

* fix test