Chia-Network / chia-blockchain / 30942375067

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Fix deadlock when creating the DataLayer wallet during sync (#21225)

The wallet sync path holds WalletStateManager.lock for the duration of
sync. When _add_coin_states discovers a DataLayer launcher and no
DataLayer wallet exists yet, it called
get_dl_wallet(create_if_not_found=True), which re-acquires the same
non-reentrant asyncio.Lock, deadlocking the sync task. Create the
wallet directly at the sync call site instead, leaving get_dl_wallet
unchanged for RPC callers.

Regression from #20320 (baf8bd05c0).

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