feat: Integrate Toolbox SDK for LangGraph orchestration.

[anubhav756]

• Load all tools using Toolbox
  • Remove the code that creates tools within the orchestration
• Remove creation of ClientSession in the client app
  • Toolbox SDK handles this internally
  • Also remove it from the orchestrator's main class
  • Remove accompanying methods as well
• Use bind_tools API to bind tools with the model
  • Remove information about tools from the prompt template
  • Also remove input/output formatting instructions and suffix
  • Remove code that creates AIMessage from the json formatted string response
• Remove ToolMessage while inserting ticket to fix issue causing InvalidArgument error.
  • Also remove AI and human messages to further simplify the code.
• Fix issue causing different messages to show up on decline ticket before and after page refresh.
  • We now return the actual response from the LLM instead of a hardcoded response in case of LangGraph.
• Fix minor typos in the prompt prefix
• Use LangGraph's prebuilt ToolNode
  • Remove code that creates custom ToolNode
• Update frontend code to correctly parse query trace
  • Remove SQL from trace (currently not supported in Toolbox)
  • Fix CSS
• Add dependency on toolbox-langchain
• Remove unused imports

Diagram

Note

We need a running Toolbox service with a tools.yaml to load and invoke the tools now.

[anubhav756]

/gcbrun

[anubhav756]

Closing this PR as it's bifurcated into the following smaller PRs:

• feat: Add tools file for the Cymbal Air tools #539
• feat: Consolidate on a single LangGraph orchestration #540
• fix!: Remove obsolete orchestrations #541
• feat: Integrate Toolbox SDK to replace Retrieval Service #542
• chore: Remove the obsolete retrieval service #543
• fix: Improve frontend UX & consistent message history #545