Function encode_load_miss 

pub fn encode_load_miss(resource_id: u32, prefetch: bool) -> Vec<u8> 

Encode a single ring-buffer slot for a load-miss request.

Returns a 64-byte Vec<u8> containing the slot words:

• status = slot::PUBLISHED
• opcode = opcode::LOAD_MISS
• tenant = 0
• priority = 0
• arg0 = resource_id (opaque to vyre; consumer-defined)
• arg1 = prefetch as u32