fix: take the wormhole volume fee from the shipped runtime metadata

[n13]

Summary

Follow-up to #606 (comment) — the volume fee is no longer a hand-maintained copy of a runtime value.

final int wormholeVolumeFeeBps = wormhole_pallet.Constants().volumeFeeRateBps;

It comes from the metadata the app already ships with (the generated pallet constants). A runtime that changes the fee needs regenerated bindings and a new build — never an edited literal. Everything downstream (coin selection, wormholeNetScaled, the proof's volume_fee_bps, the fee labels) is unchanged and keeps reading that one value.

Regenerated bindings

The committed bindings still said volumeFeeRateBps = 10, so they were regenerated against planck (melos run generate + melos run format). Beyond the fee, this brings in the runtime drift that had accumulated:

• Assets and AssetsHolder are gone — the runtime removed them (// Index 17 was pallet_assets (removed). Kept vacant so downstream pallet indices stay stable.), which also removes reversible schedule_asset_transfer / schedule_asset_transfer_with_delay
• wormhole: GenesisEndowmentsPending, PotentialWormholeBalance, TotalWormholeExits storage dropped, new events/errors, updated docs
• referenda, reversible transfers, scheduler, system, mining rewards: new events/errors, changed docs
• dilithium: DilithiumSignatureScheme variants updated

Because those calls can no longer exist on chain, the code that decoded them goes too: the call decoder's Assets branch and the two reversible asset-transfer cases, their tests, and the cold-wallet Asset / Reversible asset debug payloads and display test.

Note: AmountField.assetId / TransferSummary.assetId (and the "ASSET SEND" title branch) stay in the display model — nothing can populate them now, so they're inert. Removing them touches both apps' call-detail UIs; happy to do it in a follow-up.

Verification

• melos run analyze — clean across all four packages
• melos run format — no changes after regeneration
• quantus_sdk flutter test: 168 pass; the 5 failures are the pre-existing setUpAll ones that need the compiled Rust dylib (identical on an untouched main checkout)
• mobile-app 288 pass, cold-wallet-app 26 pass, miner-app 12 pass (its one failure is the pre-existing empty test/widget_test.dart)
• wormhole_coin_selection_test asserts the fee is 4 and 0.04%, now sourced from the regenerated metadata