chore(deps): update urllib3 and langchain-core to fix security vulnerabilities

Update transitive dependencies to address 3 high severity vulnerabilities:

- urllib3: 2.5.0 -> 2.6.2
  - Fixes: Improper handling of highly compressed data (CVE pending)
  - Fixes: Unbounded links in decompression chain (CVE pending)

- langchain-core: 1.0.5 -> 1.1.3
  - Fixes: Template injection via attribute access in prompt templates

See: https://github.com/redis-developer/langgraph-redis/security/dependabot

Author: bsbodden