Support medatada > 520 Bytes

[hans-crypto]

Broken: https://ordpool.space/tx/c50ed012bcfd8f890269b2802c7c20308c5a6a0a99499d65db1fcae71c3ab707

see: https://github.com/ordinals/ord/blob/2179bca7f857ffaf0925a36c16071567c4bf5c22/src/inscriptions/tag.rs#L21

What's interesting about this inscription is that the metadata field exceeds 520 bytes. The solution involves concatenating all fields with ID 5 and interpreting the product as CBOR. Note that the chunks do not need to be consecutive. That is, you can have a chunk "5" of metadata, then a "3"-parent, then the next chunk "5" of metadata, and then another parent.