Daily UpCap+MomGap trading on an IBKR paper account

Connects to IB Gateway through ib_async and trades the S&P 500 with the
UpCap+MomGap factor combo ported from quant-trading's
fc_up_cap_mom_gap_daily: signal on opens through today's open, equal
weight top 10, MOC orders filled at today's close, 10% resize band.

- make universe/bars/check/plan/submit/fills for the daily loop; refuses
  non-paper accounts unless allow_live, open orders, stale bars, and
  orders outside 09:31-15:45 ET
- make backtest replays the live loop day by day with plan_orders and
  IBKR Fixed commissions; selection uses each day's index members
- make bars fails fast when the Gateway's historical farm is down

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

pyproject.toml

@@ -0,0 +1,25 @@
+[project]
+name = "ibkr-quant"
+version = "0.1.0"
+description = "Daily-rebalance quant trading on Interactive Brokers"
+authors = [
+    { name = "Gahow Wang", email = "gahow.wang@gmail.com" }
+]
+requires-python = ">=3.12"
+dependencies = [
+    "ib-async>=2.1.0",
+    "lxml>=6.1.3",
+    "pandas>=3.0.6",
+]
+
+[project.scripts]
+ibkr-quant = "ibkr_quant.cli:main"
+
+[build-system]
+requires = ["uv_build>=0.9.0,<0.10.0"]
+build-backend = "uv_build"
+
+[dependency-groups]
+dev = [
+    "pytest>=9.1.1",
+]