Cost tracking records more details about each model

When Claude Code tracks the cost of using each model, it now passes along more details about the model:

• context window, how much text the model can take in at once
• maximum output tokens, how much it can write in one reply
• its standard model name
• the provider
• the cost basis

The counts it sends to OpenTelemetry, a standard way of sending usage figures to monitoring tools, are now sent slightly later rather than immediately.