Changes since langchain-openai==0.3.11
openai[patch]: upgrade tiktoken and fix test (#30621)
openai: release 0.3.12 (#30616)
openai[patch]: support structured output and tools (#30581)
openai[patch]: ignore file blocks when counting tokens (#30601)
langchain-openai: Support token counting for o-series models in ChatOpenAI (#30542)
docs,langchain-community: Fix typos in docs and code (#30541)