Specialized error handling for the event processing pipeline in the double-entry ledger system.

This module provides utilities for processing, transforming, and propagating errors that occur during event processing. It handles error mapping between different data structures (transactions, events, event maps) while maintaining detailed error context.

Key responsibilities:

• Transfer validation errors from event/transaction changesets to event map changesets
• Maintain error context and traceability for audit and troubleshooting
• Build structured error responses for client consumption and retry logic

Examples

# Map event validation errors to an event map changeset
iex> default_response_handler(
...>   {:error, :new_command, event_changeset, %{}},
...>   command_map,
...>   "MyWorker"
...> )
{:error, %Ecto.Changeset{data: %DoubleEntryLedger.Command.TransactionCommandMap{}}}

# Map transaction validation errors to an event map changeset
iex> default_response_handler(
...>   {:error, :transaction, trx_changeset, %{}},
...>   command_map,
...>   "MyWorker"
...> )
{:error, %Ecto.Changeset{data: %DoubleEntryLedger.Command.TransactionCommandMap{}}}