Fixes Layout Sig To Match WASM-RQ Format

[j-rafique]

Problem

Uploads were failing with "layout signature verification failed" because WASM and Go RaptorQ libraries generate different JSON formats for the same layout.

Root Causes

1. encoder_parameters Format Mismatch

• WASM: [0,0,0,0,1,0,255,248,1,0,1,8] (JSON array)
• Go: "AAAAAAEA//gBAAEI" (base64 string - Go's default for []byte)

2. Whitespace Differences (Fixed in JS-SDK)

• WASM: 752 bytes (pretty-printed)
• Go: 501 bytes (compact)

Since supernodes regenerate layouts and verify signatures against them, different JSON formatting causes verification to fail.

Example Layouts

WASM - 1B File

{
  "blocks": [
    {
      "block_id": 0,
      "encoder_parameters": [
        0, 0, 0, 0, 1, 0, 255, 248, 1, 0, 1, 8
      ],
      "original_offset": 0,
      "size": 1,
      "symbols": [
        "Fdk1UZD5oqoWEv2i9TCV9sbbgD2vayPWWVqh6ZfnT1cB",
        "DySR4dZ3cScEaUXsBnDY9YkeokwhSHPwyJGHWiehhzjK",
        "D7yQgEBzxGqW9jVMCTjsgf5iX5bCivdmWgMT1tEjH2Fn",
        "Z7pwhLmPqXAXYMVHRwJzei9oe5diCSGPDmAVkTR4Y28",
        "6crCpzcSsGErHT7oyMDZyeuG9xqmUY1ydcP8HUsy4ZN2",
        "Ee25jTZ85wNCTE7ypaYW7zERtETtdcKm2YosbYAJzXrj",
        "G2Ere33Rq8aaxW5vrUQbjjdXizKiw24aDz7htB7ApY21"
      ],
      "hash": "43ZQtVuQEyYertQiuVtKAhgQ9PKgBQiaXFCbK5gpkYWW"
    }
  ]
}

Go RQ - 1B File

{
  "blocks": [
    {
      "block_id": 0,
      "encoder_parameters": "AAAAAAEA//gBAAEI",
      "original_offset": 0,
      "size": 1,
      "symbols": [
        "Fdk1UZD5oqoWEv2i9TCV9sbbgD2vayPWWVqh6ZfnT1cB",
        "DySR4dZ3cScEaUXsBnDY9YkeokwhSHPwyJGHWiehhzjK",
        "D7yQgEBzxGqW9jVMCTjsgf5iX5bCivdmWgMT1tEjH2Fn",
        "Z7pwhLmPqXAXYMVHRwJzei9oe5diCSGPDmAVkTR4Y28",
        "6crCpzcSsGErHT7oyMDZyeuG9xqmUY1ydcP8HUsy4ZN2",
        "Ee25jTZ85wNCTE7ypaYW7zERtETtdcKm2YosbYAJzXrj",
        "G2Ere33Rq8aaxW5vrUQbjjdXizKiw24aDz7htB7ApY21"
      ],
      "hash": "43ZQtVuQEyYertQiuVtKAhgQ9PKgBQiaXFCbK5gpkYWW"
    }
  ]
}