feat(requests): add bulk update, bulk delete and a count endpoint

tests/test_import_flow.py

@@ -1270,3 +1270,27 @@ def test_connections_hear_about_committed_rows(client, monkeypatch):
     calls.clear()
     client.delete(f"/api/requests/{req_id}")
     assert calls == [("POST", "http://hook/in")]  # nothing new on disk, no scan
+
+
+def test_bulk_move_delete_and_count(client):
+    def lib(name, media_type):
+        return client.post("/api/libraries", json={
+            "name": name, "media_type": media_type,
+            "root_path": str(client.tmp_path / name)}).json()["id"]
+
+    a, b, audio = lib("a", "ebook"), lib("b", "ebook"), lib("audio", "audiobook")
+    ids = [client.post("/api/requests", json={"library_id": a, "title": f"T{i}"}).json()["id"]
+           for i in range(3)]
+    assert client.get("/api/requests/count?status=missing").json() == {"count": 3}
+
+    assert client.put("/api/requests/bulk", json={
+        "ids": ids[:2], "library_id": audio}).status_code == 400
+    assert client.put("/api/requests/bulk", json={
+        "ids": ids[:2], "library_id": b}).json() == {"updated": 2}
+    assert [r["id"] for r in client.get(f"/api/requests?library_id={b}").json()] \
+        == sorted(ids[:2], reverse=True)
+
+    assert client.request("DELETE", "/api/requests/bulk",
+                          json={"ids": ids[1:]}).json() == {"deleted": 2}
+    assert client.get("/api/requests/count?status=missing").json() == {"count": 1}
+    assert [r["event"] for r in client.get("/api/history").json()] == ["deleted"] * 2