Refactor Agent and AgentState into a single AgentInfo type

[bhouston]

Currently, AgentTracker has both an Agent type and an AgentState type which contain duplicative information. This creates unnecessary complexity and potential for inconsistency.

Proposed Changes

• Merge Agent and AgentState into a single AgentInfo type
• Update all references to these types throughout the codebase
• Ensure backward compatibility where possible
• Update the AgentTracker class to use the new unified type

Implementation Details

• Create a new AgentInfo interface that combines all fields from both types
• Refactor the AgentTracker class to use a single Map for storing agent data
• Update all methods that currently use either type
• Update all imports in other files to use the new type

Benefits

• Simplified data model
• Reduced potential for inconsistency between the two data structures
• Cleaner code and easier maintenance