docs: 补依赖清单与 README

此前仓库无任何依赖声明。按 AST 扫描全部 import 后按用途切分：
requirements.txt 为核心运行时 8 个包，requirements-dev.txt 追加测试与
research/ 所需。

matplotlib / mplfinance / xgboost / scikit-learn 只出现在 ChanPY.py、
ChanLun_Classifier.py、Find_Trend.py、ChanHeng.py 这四个零引用文件中，
故不纳入清单；ChanPY.py 依赖的外部 chan.py 库本就未安装。

README 记录目录结构、启动方式、库用法、分析流程九步与数据约定，并注明
三处现存问题：web/DEPLOY_GUIDE.md 引用的 6 个部署脚本已在 7f393b9 删除、
web/README.txt 指向不存在的 web/requirements.txt、systemd unit 的端口
8123 与 config.py 默认的 8128 不一致且 gunicorn 未声明。

清单已在全新空 venv 中验证：仅装 requirements.txt 时 57 个模块可导入、
Flask 16 条路由正常；装 dev 清单后测试 24 通过。

Co-authored-by: Cursor <cursoragent@cursor.com>

requirements-dev.txt

@@ -0,0 +1,32 @@
+# Tests and research/ — everything beyond the core runtime.
+#
+#   .venv/bin/pip install -r requirements.txt -r requirements-dev.txt
+#   .venv/bin/python -m pytest chanlun/tests web/tests
+
+-r requirements.txt
+
+# --- tests -----------------------------------------------------------------
+pytest>=8.0
+
+# --- research/ -------------------------------------------------------------
+# pyarrow reads the data/binance/*.feather klines (research/lib/data.py) and
+# writes the parquet cache. Needed for research/, not by the web app.
+pyarrow>=15.0
+
+# Only research/step10_direct_return_label.py and step11_breakout_follow.py.
+# Neither is installed by default; skip this pair unless running those steps.
+scikit-learn>=1.4
+lightgbm>=4.3
+
+# --- indicator parity check (optional) -------------------------------------
+# chanlun/indicators/ta.py replaced TA-Lib and technical, so nothing here needs
+# them at runtime. chanlun/tests/test_ta_compat.py pins our output against
+# TA-Lib bar for bar and SKIPS SILENTLY when they are absent — meaning a change
+# to ta.py can look tested when it was not. Install these and re-run that file
+# whenever ta.py changes.
+#
+# TA-Lib needs the C library first:
+#   sudo apt-get install -y libta-lib0 ta-lib-dev
+#
+# TA-Lib>=0.6
+# technical>=1.7