Fix formatting in README.md

fix

feat: attest final code hash + solved_attempt_idx; tidy pass summary; update README (streaming/eval quickstarts, results table)

read me updated

feat(eval): add 6 harder tasks to separate pass@1 vs pass@k

changes

feat(attest): add hash-chained receipts + verifier script

feat(stream): exact token counts + robust SSE; add run script

changes

chore: scaffold repo(config, env example, structure

Initial commit