v0.15.0 — TON victims + NFTs

Added

• victims on TON lists victims only. Notes sent to the address (a small
  transfer with a comment), gas refunds and arrival notices from jetton
  wallets and NFT items, and bounces are marked on TON rows and no longer
  count as sources — nor as counterparties in a trace or as a first funder.
  On the fragment-api collector this gives the 200 victims and 10,080.38 TON
  that took a separate script before.
• NFTs taken, per victim (TON). victims counts the NFTs each sender lost
  (Telegram usernames, numbers, domains), lists NFT-only victims, and adds an
  nfts column to the CSV and the web table data. Aborted NFT transfers are
  not counted.

Fixed

• TON balances reported MISMATCH over gas. The net-vs-balance check
  allowed 0.01 TON in total; it now allows each outgoing transaction its fee.
• Case fragment-api: 15 NFTs, not 19. Four NFT transfers to the collector
  failed and the owners kept those NFTs; build_victims.py counted them.