chore: add fdv2 store & update sources to use fdv2 protocol definitions #229

Job	Run time
go-versions / go-versions	4s
Windows, Go 1.23	54s
Windows, Go 1.22	1m 49s
Windows, Go 1.18	48s
Linux, Go 1.18 / Benchmarks	3m 54s
Linux, Go 1.18 / Contract Tests	27s
Linux, Go 1.18 / Unit Tests and Coverage	21s
Linux, Go 1.22 / Benchmarks	3m 37s
Linux, Go 1.22 / Contract Tests	18s
Linux, Go 1.22 / Unit Tests and Coverage	22s
Linux, Go 1.23 / Benchmarks	3m 43s
Linux, Go 1.23 / Contract Tests	24s
Linux, Go 1.23 / Unit Tests and Coverage	25s
	17m 6s

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