chore: track precompute and ops scripts; move monitor proxy into .env

The monitor start script used to embed the proxy URL with credentials,
which kept scripts/ out of git. It now reads QUANT_MARKET_PROXY from the
untracked repo-root .env.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

.gitignore

@@ -49,3 +49,9 @@ Thumbs.db
 data/.*.lock
 data/backup_*/
 data/*_unavailable.json
+
+# Local secrets, logs and agent scratch output
+.env
+logs/
+memory/
+.tmp_finance/