Flashback Neoforge Fixed

Fixes:

• Preserve recorded modded custom-payload bytes exactly until the viewing client decodes them.
• Fix Cobblemon replay disconnects such as Invalid species: cobblemon:totodile after a lazy species_sync packet was re-encoded as an empty registry.
• Keep NeoForge advanced entity spawn handling and legacy replay safety checks intact.
• Apply the lossless forwarding path generically so other lazy or one-shot mod packet codecs do not suffer the same decode/re-encode corruption.
• Support affected existing recordings whose payload bytes were captured by earlier Flashback NeoForge Fixed releases.