* build(model_prices_and_context_window.json): mark all gemini-2.5 models as supporting pdf input
Closes https://github.com/BerriAI/litellm/issues/11881
* fix(anthropic_transformation.py): set custom llm provider custom property
Fixes https://github.com/BerriAI/litellm/issues/11861
* test: add unit test for checking supports_reasoning
* test: add test for vertex ai flow
* feat(bedrock/anthropic): ensure thinking param correctly passed for bedrock/invoke
