fix preflight config path check

src/orisys/configs.py

@@ -103,7 +103,17 @@ def _runtime_roots() -> list[Path]:
         except (OSError, ValueError):  # pragma: no cover - defensive
             continue
 
-    return [path for path in _unique_paths(anchors) if _is_sdk_runtime_root(path)]
+    anchors = _unique_paths(anchors)
+    # Keep the *innermost* matching directories. Walking up from the launcher
+    # also visits every parent, and a parent that happens to carry an
+    # ``examples/`` directory must not outrank the real root below it: doing so
+    # made a workspace directory shadow the release root's own bundle.
+    return [
+        path
+        for path in anchors
+        if _is_sdk_runtime_root(path)
+        and not any(other != path and other.is_relative_to(path) for other in anchors)
+    ]
 
 
 def _candidate_config_dirs() -> list[Path]:

src/orisys/sensor.py

@@ -1271,9 +1271,11 @@ class Sensor:
         that root had coefficients.
         """
         attempts = self._force_cal_attempts or []
-        found = [entry for entry in attempts if entry.get("found_root") is not None]
+        # ``found_root`` is keyed even when nothing was found (valued None), so
+        # test its value, not the key.
+        found = [entry for entry in attempts if entry.get("found_root")]
         with_cal = [entry for entry in found if entry.get("force_calibration_json")]
-        chosen = (with_cal or found or attempts or [None])[0]
+        chosen = (with_cal or found or [None])[0]
         searched: list = []
         for entry in attempts:
             for root in entry.get("searched") or ():