Step 002C: Download genesis (mainnet) do /var/lib/solana/ledger (fix na "failed to open genesis")

Objaw w logach:
  Failed to load genesis_config ... missing genesis.bin
  Extracting "/var/lib/solana/ledger/genesis.tar.bz2"...
  Failed to start validator: failed to open genesis ... No such file or directory

Fix:
- Zaciagnij genesis archive na dysk i zrestartuj serwis.

1) Zatrzymaj validator (zeby nie robil restart loop)
  sudo systemctl stop agave-validator

2) Pobierz genesis.tar.bz2 do ledger (jako user `solana`)
  sudo -u solana -H bash -lc '
    cd /var/lib/solana/ledger
    rm -f genesis.tar.bz2 genesis.bin
    curl -sSfL https://api.mainnet-beta.solana.com/genesis.tar.bz2 -o genesis.tar.bz2
    ls -lh genesis.tar.bz2
  '

Oczekiwane:
  - plik genesis.tar.bz2 istnieje (ok. kilkadziesiat KB)

3) Start + logi
  sudo systemctl start agave-validator
  systemctl status agave-validator --no-pager -l
  sudo journalctl -u agave-validator -n 80 --no-pager

4) RPC check (local/WG)
  curl -sS -H 'content-type: application/json' \
    --data '{"jsonrpc":"2.0","id":1,"method":"getVersion"}' \
    http://10.66.66.1:8899 | jq .