commitarena v0.1.1

Restore sqlparse license notice verbatim; fix leaderboard overflow. No engine or demo-result changes.

• src/commitarena/demo/LICENSE-sqlparse is again a byte-for-byte copy of the upstream BSD-3-Clause license, copyright notice included.
• Report: the leaderboard fits at 1280 px (the "Ended by" column wraps instead of pushing "Cutoff" out of the card), and the page no longer overflows horizontally at 390 px; wide tables scroll inside their card.

Install: uvx --from git+https://github.com/diegoperezg7/commitarena@v0.1.1 commitarena demo