Fixed handling of reason on unbonding events #180

Job	Run time
Check Draft State	1s
Docker (development, linux/amd64) / CI	7m 17s
Docker (production, linux/arm64) / CI	20m 16s
Docker (production, linux/amd64) / CI	10m 16s
Docker (development, linux/arm64) / CI	28m 13s
	1h 6m 3s

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