fix(packaging): preserve src wheel import contract

.github/workflows/ci.yml

@@ -36,6 +36,32 @@ jobs:
           set -euo pipefail
           python -m pip check
 
+      - name: Verify clean wheel package contract
+        run: |
+          set -euo pipefail
+          TMP_DIR="$(mktemp -d)"
+          trap 'rm -rf "$TMP_DIR"' EXIT
+          python -m pip wheel --no-deps --wheel-dir "$TMP_DIR/dist" .
+          python -m venv --system-site-packages "$TMP_DIR/venv"
+          (
+            cd "$TMP_DIR"
+            unset PYTHONPATH
+            "$TMP_DIR/venv/bin/python" -m pip install "$TMP_DIR/dist"/*.whl
+            "$TMP_DIR/venv/bin/python" - <<'PY'
+          import importlib
+          from pathlib import Path
+
+          package_root = Path(importlib.import_module("src").__file__).parent
+          required = [
+              package_root / "__init__.py",
+              package_root / "backtest.py",
+              package_root / "strategy_lifecycle" / "orchestrator_runner.py",
+          ]
+          assert all(path.is_file() for path in required), required
+          importlib.import_module("src.strategy_lifecycle.orchestrator_runner")
+          PY
+          )
+
       - name: Run ruff
         run: |
           set -euo pipefail

pyproject.toml

@@ -27,8 +27,8 @@ dependencies = [
 test = ["pytest>=8"]
 
 [tool.setuptools]
-package-dir = {"" = "src"}
+package-dir = {"" = "."}
 
 [tool.setuptools.packages.find]
-where = ["src"]
-
+where = ["."]
+include = ["src", "src.*"]