langchain==1.3.12

Changes since langchain==1.3.11

release(langchain): 1.3.12 (#38730)
fix(langchain): propagate interrupts through ToolRetryMiddleware (#38722)
fix(langchain): avoid shared process-group kill in shell middleware (#36359)
fix(langchain): sanitize anthropic cache markers on fallback retries (#37867)
style: fix some ruff preview rules in langchain_v1 and standard-tests (#38657)
chore(langchain): add types in agent middleware tests (#38188)