Nomad changes

docs/snippets/python/plugins/stateful_plugin.md

@@ -0,0 +1,28 @@
+```python title="Python"
+import threading
+from kreuzberg import ExtractionResult
+
+class StatefulPlugin:
+    def __init__(self):
+        self.lock: threading.Lock = threading.Lock()
+        self.call_count: int = 0
+        self.cache: dict = {}
+
+    def name(self) -> str:
+        return "stateful-plugin"
+
+    def version(self) -> str:
+        return "1.0.0"
+
+    def process(self, result: ExtractionResult) -> ExtractionResult:
+        with self.lock:
+            self.call_count += 1
+            self.cache["last_mime"] = result.mime_type
+        return result
+
+    def initialize(self) -> None:
+        pass
+
+    def shutdown(self) -> None:
+        pass
+```