ACT-001: actuator-first sensor lifecycle

app/ml/registry/model_registry.py

@@ -20,6 +20,8 @@ class ModelRegistry:
     def __init__(self, root: str | Path) -> None:
         self._root = Path(root).resolve()
         self._root.mkdir(parents=True, exist_ok=True)
+        self._archive_root = self._root / "archive"
+        self._archive_root.mkdir(parents=True, exist_ok=True)
         self._artifacts: dict[str, TrainedArtifact] = {}
         self._lock = RLock()
         self._load_existing()
@@ -43,10 +45,27 @@ class ModelRegistry:
                 raise KeyError(f"Artifact '{artifact_id}' nicht registriert.")
             return self._artifacts[artifact_id]
 
+    def get_optional(self, artifact_id: str) -> TrainedArtifact | None:
+        self._validate_artifact_id(artifact_id)
+        with self._lock:
+            return self._artifacts.get(artifact_id)
+
     def list_models(self) -> Iterable[TrainedArtifact]:
         with self._lock:
             return [self._artifacts[key] for key in sorted(self._artifacts)]
 
+    def archive(self, artifact_id: str) -> bool:
+        self._validate_artifact_id(artifact_id)
+        with self._lock:
+            artifact = self._artifacts.pop(artifact_id, None)
+            source = self._root / f"{artifact_id}.json"
+            if not source.exists():
+                return artifact is not None
+            target = self._archive_root / f"{artifact_id}.json"
+            os.replace(source, target)
+            logger.info("Modell archiviert: %s", target)
+            return True
+
     def _load_existing(self) -> None:
         for source in sorted(self._root.glob("*.json")):
             try: