[edge_orchestrator] In fake_model_forwarder redesign or think how detected_objects are stored

[bojeanson]

Description

In edge_orchestrator/src/edge_orchestrator/infrastructure/adapters/model_forwarder/fake_model_forwarder.py,

Is the object_1 the good way to name it ?

detected_objects={
                    "object_1": DetectedObject(

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