langchain-core 1.6.7

Changes since langchain-core==1.6.6

release(core): 1.6.7 (#41087) fix(core): include openai redacted_content in v1 output for bedrock converse (#41086) fix(core): python 3.14 hardening around inspect.signature (#41059) chore(deps): bump notebook from 7.5.7 to 7.6.3 in /libs/core (#41057) chore(deps): bump notebook from 7.5.6 to 7.5.7 in /libs/core (#40992) chore(deps): bump urllib3 from 2.7.0 to 2.8.0 in /libs/core (#40972) chore(deps): bump tornado from 6.5.8 to 6.5.9 in /libs/core (#40970)