Initial commit: manifoldbt public repo

Python DSL, examples, docs, benchmarks, and tests.
Rust engine distributed as pre-compiled wheel via PyPI.

python/tests/test_compile_roundtrip.py

@@ -0,0 +1,44 @@
+"""Round-trip test: Python DSL -> JSON -> Rust strategy compiler."""
+import json
+
+import manifoldbt as bt
+
+
+def test_dsl_strategy_compiles_via_rust():
+    """Strategy built with Python DSL successfully compiles through Rust."""
+    signal = bt.when(
+        bt.col("close") > bt.col("close").lag(1),
+        bt.lit(1.0),
+        bt.lit(0.0),
+    )
+
+    strategy = bt.Strategy(
+        name="compile_test",
+        signals={"signal": signal},
+        position_sizing=bt.col("signal"),
+    )
+
+    summary_json = bt.compile_strategy_json(strategy.to_json())
+    summary = json.loads(summary_json)
+
+    assert summary["name"] == "compile_test"
+    assert "signal" in summary["signal_names"]
+    assert "close" in summary["required_columns"]
+
+
+def test_strategy_with_params_compiles():
+    """Strategy with parameters compiles correctly."""
+    size = bt.param("size", default=1.0, range=(0.5, 2.0))
+
+    strategy = bt.Strategy(
+        name="param_test",
+        signals={"signal": bt.lit(1.0)},
+        position_sizing=bt.col("signal") * size,
+        parameters={"size": size},
+    )
+
+    summary_json = bt.compile_strategy_json(strategy.to_json())
+    summary = json.loads(summary_json)
+
+    assert summary["name"] == "param_test"
+    assert "size" in summary["parameters"]