Escape curly braces in LangChain system prompts to prevent template conflicts

Disable tiktoken for embedding generation

Update dependency versions

Fix ChatMessageResponse validation error

Fix LangChain template issue

Update field names

Merge remote-tracking branch 'origin/main'

Update dependencies for LangChain

Update dependencies for LangChain

Improve agent pipeline using LangChain

Merge remote-tracking branch 'origin/main'

Update sync success notification message

Update sync success notification message

Implement disconnecting Hubspot account

Fix chat history scrolling issue