More fuzzy traces #18

Job	Run time
validate (erasure)	48s
validate (codec)	46s
validate (stf/accumulate)	44s
validate (traces)	1m 6s
validate (stf/assurances)	47s
validate (stf/authorizations)	51s
validate (stf/disputes)	52s
validate (stf/reports)	43s
validate (stf/preimages)	46s
validate (stf/history)	44s
validate (stf/safrole)	53s
validate (stf/statistics)	48s
	9m 48s

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