Updated namespaces for `CheckQueryExecutionBehavior`,
`MainQueryExecutionBehavior`, and `ReCRequestExecutionBehavior`
from `ECMJobRunner.Application.Behaviors` to
`ECMJobRunner.Application.DEXJob.Commands.Behaviors` to better
align with the `DEXJob.Commands` context.
Updated `DependencyInjection.cs` and test files to reference the
new namespace. Added `using Microsoft.Extensions.Options;` to
support the Options pattern in the updated files.
TekH
a698f8daae