fix(ingest): raise ref cap to 50 and clarify invalid bvid error

tests/test_telegram.py

@@ -15,6 +15,7 @@ from reaction_board.notify.telegram import (  # noqa: E402
     TelegramClient,
     TelegramError,
     format_duration,
+    format_manual_reply,
 )
 from reaction_board.services.library import (  # noqa: E402
     ActionResult,
@@ -51,6 +52,19 @@ def test_format_duration():
     assert format_duration(3725) == "1:02:05"
 
 
+def test_manual_reply_truncation_notice():
+    result = ManualIngestResult(
+        refs=50, added=1, truncated=2,
+        results=[IngestResult(True, 1, "added", title="t", message="已入库")],
+    )
+    text = format_manual_reply(result)
+    assert "共识别 50 个引用" in text
+    assert "还有 2 个引用未处理" in text
+    assert format_manual_reply(ManualIngestResult()) == (
+        "未识别到 B 站视频引用，请发送视频链接或 BV 号，例如 BV1x8x166EzY。"
+    )
+
+
 def test_send_candidates_and_chunking():
     transport = FakeTransport()
     bot = TelegramClient("token", 42, transport=transport)
@@ -300,6 +314,7 @@ def test_poller_backoff_and_recovery():
 
 def main():
     test_format_duration()
+    test_manual_reply_truncation_notice()
     test_send_candidates_and_chunking()
     test_send_candidates_dedupes_by_aid()
     test_get_updates_and_answer()