Add operation runner

Problem

BBO operations need a migration orchestrator to manage the execution of individual migrations. Currently there's no mechanism to:

1. Find or create the next batch job for a migration
2. Determine batch boundaries using appropriate batching strategies
3. Handle migration lifecycle events (finish, failure, optimization)
4. Delegate job execution to the appropriate wrapper

Solution

Implement a OperationOrchestrator that orchestrates the execution of a single migration, similar to the existing BBM pattern.

The runner should:

• Find or create the next batch job for a migration

• Determine batch boundaries using batching strategies

• Delegate job execution to BatchedMigrationWrapper

• Handle migration lifecycle (finish, failure, optimization)

• Add Runner