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Motivation
Fixes a deadlock in anvil --fork-transaction-hash (see #13630).
Miner::poll previously waited on ready!() before consuming force_transactions, so replay transactions could remain unconsumed and same-sender nonce-dependent transactions could stay queued forever.
Solution
Miner::poll now consumes force_transactions before readiness blocking, so replay transactions are emitted on the first poll and nonce dependencies can progress. Forced inclusion is still one-time, then normal mining mode polling continues.
Added regression test:
PR Checklist