* feat: add usage columns to steps table
Adds denormalized usage fields to the steps table for easier querying:
- model_handle: The model handle (e.g., "openai/gpt-4o-mini")
- cached_input_tokens: Tokens served from cache
- cache_write_tokens: Tokens written to cache (Anthropic)
- reasoning_tokens: Reasoning/thinking tokens
These fields mirror LettaUsageStatistics and are extracted from the
existing prompt_tokens_details and completion_tokens_details JSON columns.
🤖 Generated with [Letta Code](https://letta.com)
Co-Authored-By: Letta <noreply@letta.com>
* chore: regenerate OpenAPI specs and SDK for usage columns
🤖 Generated with [Letta Code](https://letta.com)
Co-authored-by: Sarah Wooders <sarahwooders@users.noreply.github.com>
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Co-authored-by: Letta <noreply@letta.com>
Co-authored-by: letta-code <248085862+letta-code@users.noreply.github.com>
Co-authored-by: Sarah Wooders <sarahwooders@users.noreply.github.com>
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