feat: add Quant OS A-share baseline

.env.example

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+# Copy to .env only on the execution machine. Never commit the populated file.
+
+# Optional local JQData adapter. Prefer an interactive prompt; if environment
+# injection is used, keep the populated file outside Git and Obsidian.
+JQDATA_USERNAME=replace-at-runtime
+JQDATA_PASSWORD=replace-at-runtime
+
+# QMT/MiniQMT supplies authentication through its licensed logged-in client.
+QMT_USERDATA_PATH=/absolute/path/to/your/qmt/userdata_mini
+QMT_SESSION_ID=600001
+QMT_ACCOUNT_ID=replace-with-local-account-id
+# Path only. The tool creates this local 0600 HMAC key; never copy its
+# contents into Git, Obsidian, logs, notebooks, or chat.
+QMT_ACCOUNT_HASH_KEY_FILE=/absolute/local/path/account-hash.key
+
+# Safety defaults. The built-in QMT strategy is always backtest-only.
+QMT_ALLOW_LIVE_ORDERS=false