feat: add runAgent functionality to execute agent commands and update…

[ducheharsh]

This pull request introduces support for tracking and updating user credit balances when interacting with agents, as well as a new endpoint for running agents. The main changes include schema updates for user credits, a new API route and controller method for running agents, and logic to decrement user credits based on agent usage.

User credit management:

• Added creditBalance and creditBalanceLastUpdated fields to the user table and Prisma schema, with defaults set for new users. [1] [2]

Agent execution and credit deduction:

• Implemented runAgent method in AgentService to execute an agent, calculate credit usage based on agent costs and token usage, and update the user's credit balance accordingly.
• Added runAgent method to AgentController and exposed a new POST endpoint /agents/:id/run in agent.route.ts for running agents. [1] [2]

Agent CRUD improvements:

• Updated agent deletion and lookup logic to ensure operations are only performed by the agent's owner by matching both id and userId. [1] [2]

Type consistency and validation:

• Improved handling of agent cost fields by ensuring numeric conversion and string consistency in controller logic. [1] [2]… user credit balance