v0.6.2 — typed read-side block.actions[] parsing + signed-method smokes Adds typed Action variant dispatch on the read side: - BlockAction abstract base + 8 typed variants (Transfer / Mint / Burn / RegisterAccount / AddAccountKey / RevokeAccountKey / RegisterSessionKey / BridgeOut) + BlockActionUnknown fallback - BlockActionParser.Parse / ParseArray (externally-tagged dispatch) - BlockDetails.GetTypedActions() ergonomic getter - JsonByteArrayConverter for the chain's number-array byte wire shape Plus integration smokes for all 24 SignedXxxAsync methods using the existing FakeSigner→4xx pattern.