langchain langchain-core==1.3.0a3

Initial release release(core): 1.3.0a3 (#36829) chore(core): keep checkpoint_ns behavior in streaming metadata for backwards compat (#36828) feat(core): Add chat model and LLM invocation params to traceable metadata (#36771) fix(core): restore cloud metadata IPs and link-local range in SSRF policy (#36816) chore(deps): bump pytest to (#36801) chore(core): harden private SSRF utilities (#36768) fix(openai): handle content blocks without type key in responses api conversion (#36725) chore: bump pytest from 9.0.2 to 9.0.3 in /libs/core (#36719) release(core): 1.3.0.a2 (#36698) fix(core): Use reference counting for storing inherited run trees to support garbage collection (#36660) docs(core): nit (#36685) release(core): 1.3.0a1 (#36656) chore(core): reduce streaming metadata / perf (#36588) release(core): release 1.2.28 (#36614) fix(core): add more sanitization to templates (#36612) release(core): 1.2.27 (#36586) fix(core): handle symlinks in deprecated prompt save path (#36585) chore: add comment explaining (#36570) release(core): 1.2.26 (#36511) fix(core): add init validator and serialization mappings for Bedrock models (#34510) feat(core): add to serializable mapping…