✨Handle strict_loading for model, record and relationship

[pimpin]

To prevent N+1 request issue, enable strict_loading as done in ActiveRecord.

Exemple

class Parent < CouchbaseOrm::Base
    attribute :name
end

class Child < CouchbaseOrm::Base
    attribute :name
    belongs_to :parent, dependent: :destroy
end

parent = Parent.create!(name: 'joe')
child = Child.create!(name: 'bob', parent_id: parent.id)

n_plus_one_protected_child = Child.where(id: child.id).strict_loading.first
n_plus_one_protected_child.parent # raise ActiveRecord::StrictLoadingViolationError

### NB you can also call ActiveRecord::Core#strict_loading!
n_plus_one_protected_child = Child.where(id: child.id).first.strict_loading!
n_plus_one_protected_child.parent # raise ActiveRecord::StrictLoadingViolationError

[pimpin]

In current implementation, calling strict loading on a model will persist...

### this test pass (quite unexpectedly)
Child.strict_loading
expect_strict_loading_error_on_calling_parent(Child.where(id: child.id).strict_loading.first)
expect_strict_loading_error_on_calling_parent(Child.where(id: child.id).first)
expect_strict_loading_error_on_calling_parent(Child.where(id: child.id).last)
expect_strict_loading_error_on_calling_parent(Child.where(id: child.id).to_a.first)
expect_strict_loading_error_on_calling_parent(Child.all.to_a.first)

[JMGDoctolib]

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