Merge pull request watchdogpolska#2403 from watchdogpolska/renovate/langchain-1.x

Update dependency langchain to v1.2.7

Author: PiotrIw

requirements/base.txt

@@ -91,7 +91,7 @@ html2text==2025.4.15
 openpyxl==3.1.5
 
 # LLM exvaluation
-langchain==1.2.6
+langchain==1.2.7
 langchain-core==1.2.7
 langchain-community==0.4.1
 #langchain[llms]==0.1.5