Bump langchain-core

Bumps [langchain-core](https://github.com/langchain-ai/langchain) from 1.2.28 to 1.3.3.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-core==1.2.28...langchain-core==1.3.3)

---
updated-dependencies:
- dependency-name: langchain-core
  dependency-version: 1.3.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

ai/gen-ai-agents/sql-graph-generator-dashboard/files/backend/requirements.txt

@@ -9,7 +9,7 @@ oci==2.119.1
 
 # LangChain
 langchain==0.2.5
-langchain-core==1.2.28
+langchain-core==1.3.3
 langchain-community==0.3.27
 
 # Data visualization