fix: bump streamingfast/reth to v2.3.0-fh-7

[sduchesneau]

Moves the streamingfast/reth pin from v2.3.0-fh-5 to v2.3.0-fh-7, picking up two Firehose balance-change fixes:

• fh-7 (fix(firehose): credit selfdestruct refund in post-tx balance resolver reth#22): the SELFDESTRUCT refund is now included when resolving an account's post-transaction balance. On the truly-destroyed path (EIP-6780) revm credits the beneficiary in place and records the move only inside its AccountDestroyed journal entry — no BalanceTransfer — so a coinbase, sender or fee vault that received a suicide refund reported a RewardTransactionFee / GasRefund old_balance contradicting the SuicideRefund event emitted moments earlier.
• fh-6: value-transfer balance changes are emitted when a transaction sends value to a precompile and then fails; the reverted callee had its BalanceTransfer journal entry truncated before the journal walk ran.

fh-5 → fh-7 touches only crates/firehose; no reth, revm or alloy-evm version moves, so the Cargo.lock diff is purely the git tag/rev for the streamingfast/reth source. cargo check --workspace --all-targets passes.

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