Fix debug_trace* decoding for pre-v6.5 blocks

This release is an optional but highly recommended upgrade for all nodes, specially RPC providers. It restores debug_trace* RPC support for transactions in blocks produced before the v6.5 upgrade, which were failing to decode under the new tx codec path. RPC operators serving historical traces should upgrade to pick up the fix.

What's Changed

• Backport release/v6.5: Fix pre-v6.5 debug trace tx decoding by @seidroid[bot] in https://github.com/sei-protocol/sei-chain/pull/3478

Full Changelog: https://github.com/sei-protocol/sei-chain/compare/v6.5.0...v6.5.1