Add dlr.proto to proto-generate command

[Sddilora]

Explanation:
The proto-generate command in the Makefile is responsible for generating Go code from protobuf files (*.proto). Currently, it includes several protobuf files for code generation, but it's missing dlr.proto.

Action:
Update the proto-generate command in the Makefile to include pkg/proto/model/dlr.proto as follows:

proto-generate: ## Protobuf Generate
	protoc -I=pkg/proto/model \
		--go_out=../../../ \
		--go-grpc_out=../../../ \
		pkg/proto/model/error.proto \
		pkg/proto/model/logging.proto \
		pkg/proto/model/authentication.proto \
		pkg/proto/model/authorization.proto \
		pkg/proto/model/user.proto \
		pkg/proto/model/dlr.proto \   # Added dlr.proto here
		--experimental_allow_proto3_optional