test(clearsign): v2 static-schema coverage for a relay solver swap (rebased)#304
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Adds V2SchemaDecodesRelaySolverArgs. Proves the device decodes a relay solver call (0x02d5f05f: token, amount, requestId) from a v2 static-schema blob and clear-signs it — the "add a new service via a signed payload" path for a contract NOT in ethereum_contractHandled. Calldata shape (selector + 3 fixed 32-byte words = 100 bytes, zero remainder) taken byte-for-byte from real relay traffic (22 live samples, all identical). firmware-unit 75/75 green locally.
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Clean cherry-pick of
8a8bfea0from #291 onto current develop (9ce5a013).#291's branch sits on the old alpha lineage (76 behind / 102 ahead), so merging it directly risks dragging stale history; the actual content is this single additive test —
V2SchemaDecodesRelaySolverArgsinunittests/firmware/signed_metadata.cpp(+64 lines, test-only, zero production code).Release-sweep finding for 7.15: this was the only orphaned content on any fork branch not already in develop. Supersedes #291, which can be closed once this lands.