Initial: fingerprint DB + Takeout fetch + ingest flows

photo_pipeline_hello.py

@@ -0,0 +1,18 @@
+"""photo-pipeline: first real flow (skeleton).
+
+Prefect 3.8 local pattern: flow.serve() registers the deployment and
+runs scheduled work. For the pilot this is the supported, storage-free path.
+"""
+
+from prefect import flow
+
+
+@flow(name="photo-pipeline-hello")
+def hello_pipeline():
+    print("photo-pipeline flow alive on .13")
+    return "ok"
+
+
+if __name__ == "__main__":
+    # serve() keeps this process alive, polls for scheduled runs
+    hello_pipeline.serve(name="hello", cron="*/5 * * * *", tags=["photo-pipeline"])