test(images): record the return route in the legacy contract snapshot; removed_total in the workspace keys (#498)

The scan runner passes returned only when set, so a stand-in events
function without that keyword still runs.

py/api/admin.py

@@ -1422,7 +1422,8 @@ class AdminRoutesMixin:
 
     async def _run_scan_job(self, job, output_dirs=None, returned=None):
         final = None
-        async for payload in self._scan_images_events(job, output_dirs, returned):
+        extra = {} if returned is None else {"returned": returned}
+        async for payload in self._scan_images_events(job, output_dirs, **extra):
             job.publish(payload)
             final = payload.get("type")
         state = SCAN_FINAL_STATES.get(final, "finished")

tests/fixtures/legacy_contract_snapshot.json

@@ -122,6 +122,7 @@
     "POST /prompt_manager/images/generate-thumbnails",
     "POST /prompt_manager/images/generate-thumbnails/progress",
     "POST /prompt_manager/images/link",
+    "POST /prompt_manager/images/removed/return",
     "POST /prompt_manager/images/rescope",
     "POST /prompt_manager/images/reveal",
     "POST /prompt_manager/jobs/autotag",

tests/test_api_images.py

@@ -3020,6 +3020,8 @@ class TestSharedListing(ImageAPITestCase):
                 "limit",
                 "has_more",
                 "next_cursor",
+                # #498: Show removed images (N).
+                "removed_total",
             },
         )
         _, folders = await self._json("GET", "/prompt_manager/gallery/subfolders")