ImpactEntry

Single entry in the impact ledger.

Field	Type	Description
`id`required	`string (uuid)`	Entry UUID
`cycle_id`required	`string (uuid)`	Cycle UUID
`task_id`	`string (uuid) \| null`	Task UUID (optional)
`action_type`required	`string`	Type of action performed (operation_type)
`target_entity`required	`string`	Target entity identifier (target_system)
`target_system`	`string \| null`	Target system name
`external_id`	`string \| null`	External system identifier
`external_ref`	`string \| null`	External reference (e.g., URL)
`attributes`	`object`	Additional attributes show nested Empty object.
`is_reversible`	`boolean`	Whether action is reversible
`performed_at`required	`string (date-time)`	When action was performed (created_at)
`entity_type`	`string \| null`	Entity type (e.g., journal_entry, invoice)
`before_state`	`object \| null`	State before operation
`after_state`	`object \| null`	State after operation
`reversal_instructions`	`object \| null`	Instructions for reversal
`reversal_status`	`string \| null`	Reversal status (pending/reversed/failed)
`tool_name`	`string \| null`	Tool that performed this action
`success`	`boolean \| null`	Whether the operation succeeded