Add Audit resource

[evanvolgas]

Summary

The core tessera API has audit log endpoints that the SDK doesn't expose yet.

Core API endpoints to support

• GET /audit - List audit events with filtering
• GET /audit/{entity_type}/{entity_id} - Get audit history for specific entity

Models needed

class AuditEvent(BaseModel):
    id: UUID
    entity_type: str  # "asset", "contract", "team", etc.
    entity_id: UUID
    action: str  # "created", "updated", "deleted", etc.
    actor_id: UUID | None
    actor_type: str  # "user", "api_key", "system"
    payload: dict
    created_at: datetime

Resource methods

• audit.list(entity_type=None, entity_id=None, action=None, since=None)
• audit.get_history(entity_type, entity_id)

Use case

Compliance and debugging - understanding who changed what and when.