chore(deps): bump langchain-core from 0.3.59 to 1.0.3 in /application

Bumps [langchain-core](https://github.com/langchain-ai/langchain) from 0.3.59 to 1.0.3.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](https://github.com/langchain-ai/langchain/compare/langchain-core==0.3.59...langchain-core==1.0.3)

---
updated-dependencies:
- dependency-name: langchain-core
  dependency-version: 1.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

application/requirements.txt

@@ -31,7 +31,7 @@ jsonpointer==3.0.0
 kombu==5.4.2
 langchain==0.3.20
 langchain-community==0.3.19
-langchain-core==0.3.59
+langchain-core==1.0.3
 langchain-openai==0.3.16
 langchain-text-splitters==0.3.8
 langsmith==0.3.42