Unspent transparent note SQL should filter by expiry

[AArnott]

@nuttycom says I should filter on transaction expiry as well. Think about re-org and abandoned transactions.

Nerdbank.Cryptocurrencies/src/nerdbank-zcash-rust/src/sql_statements.rs

Lines 93 to 102 in 8b2e5ec

	pub(crate) const GET_UNSPENT_TRANSPARENT_NOTES: &str = r#"
	SELECT
	height,
	value_zat,
	address
	FROM utxos
	LEFT OUTER JOIN transparent_received_output_spends j ON utxos.id = j.transparent_received_output_id
	WHERE received_by_account_id = :account_id AND j.transaction_id IS NULL
	ORDER BY height
	"#;