langchain-perplexity==1.4.1

Changes since langchain-perplexity==1.4.0

release(perplexity): 1.4.1 (#39826)
fix(perplexity): include type="message" on Responses input items (#39774)
fix(perplexity): preserve caller extra_body (#39203)
chore: bump pillow from 12.2.0 to 12.3.0 in /libs/partners/perplexity (#38991)
chore(deps): refresh lockfiles (#38746)
fix(perplexity): use supported Responses API model (#38337)
chore: bump vcrpy from 8.1.1 to 8.2.1 in /libs/partners/perplexity (#38290)
chore: bump langsmith from 0.8.5 to 0.8.18 in /libs/partners/perplexity (#38289)
docs: refresh README installation and resources (#38119)
release(core): 1.4.7 (#38111)
fix(core,partners): rename package version trace metadata (#38110)
style(core,langchain,langchain-classic,partners): replace double backticks in docstrings (#38095)
release(core): 1.4.6 (#38061)
feat(core,partners): add package version tracking to tracing metadata (#35295)
chore(infra): bump mypy to 2.1 and unify type-check config across the monorepo (#36470)
feat(standard-tests): validate tool call chunks during streaming (#34707)
chore(partners): bump locks (#38052)