feat: upgrade @railgun-community/wallet to 10.9.0, handle new EIP-7702 transaction type

[munikes]

Upgrades @railgun-community/wallet from 10.8.1 to 10.9.0 and @railgun-community/shared-models from 8.0.0 to 8.0.1.

The newer SDK adds EIP-7702 support, which introduces two breaking type changes: BroadcasterRawParamsTransact became a discriminated union (COMMON | TX7702) keyed on transactType, and EVMGasType gained Type4. Together these produce 7 compile errors across 4 files.

This PR does not implement EIP-7702 relaying — it makes the broadcaster reject those requests explicitly rather than assuming the old COMMON-only shape:

• transact-method.ts: type guard rejecting non-COMMON requests before destructuring, following the file's existing rejection pattern (dbg + incrementReliability(BAD_DATA) + return).
• gas-estimate.ts / process-transaction.ts: explicit throw for Type4, alongside the existing Type2 guards. TransactionGasDetailsType4 uses maxFeePerGas/maxPriorityFeePerGas rather than gasPrice, so it could never satisfy those code paths anyway.
• gas-by-speed-block-native.ts / gas-by-speed.ts: added the missing EVMGasType.Type4 switch case (this was the actual cause of the 'not all code paths return a value' errors).

Verified with the full build pipeline (tsc + tsc-alias) and running in production on Ethereum mainnet: a real relayed transaction completed end-to-end after the upgrade, with reliability incrementing normally.

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​railgun-community/​shared-models@​8.0.0 ⏵ 8.0.1	+4		+3
	@​railgun-community/​wallet@​10.8.1 ⏵ 10.9.0	+1		+1

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