* feat: add ID format validation to group schemas
Add ID format validation to GroupCreate, GroupUpdate, and manager config
schemas using existing validator types from letta.validators.
Changes:
- GroupCreate/GroupUpdate: agent_ids → List[AgentId], shared_block_ids → List[BlockId]
- SupervisorManager, DynamicManager, SleeptimeManager, VoiceSleeptimeManager:
manager_agent_id → AgentId
- Update variants: manager_agent_id → Optional[AgentId]
This ensures malformed IDs are rejected with 422 validation errors instead
of causing 500 database errors.
🤖 Generated with [Letta Code](https://letta.com)
Co-Authored-By: Letta <noreply@letta.com>
* chore: regenerate API spec and SDK
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Co-authored-by: Letta <noreply@letta.com>
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