docs: clarify preinitialize, ledger adapter, and BLE transport flows

[cursor]

Summary

• update docs/architecture.md with source-backed notes for the OneKey core stack and the Ledger adapter stack
• document the preInitialize() / usePreInitialize workflow, guard conditions, Cardano-specific constraints, and recommended call pattern
• add a React Native BLE firmware upload section to docs/transport.md covering throttling, retry, reconnect, and troubleshooting behavior

Codepaths covered

• packages/core/src/core/index.ts
• packages/core/src/device/Device.ts
• packages/core/src/api/device/PreInitialize.ts
• packages/core/src/api/cardano/CardanoSignTransaction.ts
• packages/core/src/api/cardano/CardanoSignMessage.ts
• packages/core/src/types/params.ts
• packages/hwk-adapter-core/src/types/connector.ts
• packages/hwk-adapter-core/src/types/wallet.ts
• packages/hwk-ledger-adapter/src/adapter/LedgerAdapter.ts
• packages/hwk-ledger-adapter/src/adapter/methods/allNetworkGetAddress.ts
• packages/hwk-ledger-adapter/src/connector/LedgerConnectorBase.ts
• packages/hwk-ledger-connector-webhid/src/index.ts
• packages/hwk-ledger-connector-ble/src/index.ts
• packages/hd-transport-react-native/src/index.ts

Knowledge gaps addressed

• when pre-initialize can safely skip Initialize, and when it must fail closed
• why Cardano signing is excluded from the pre-initialize fast path
• how Ledger app auto-install, all-network address lookups, and install progress events behave in practice
• why BLE firmware uploads use a different write and recovery strategy than normal transport calls

  

[revan-zhang]

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