Cursor says "about 1315 lines omitted" when I ask it a question about my 1632-line file

I do ⌘-L and ask Cursor “are there any bugs or inconsistencies?”. It makes some suggestions, but then I noticed it says

The provided SQL script appears to be truncated at the end, as indicated by the “…(about 1315 lines omitted)…” message. There might be more partitions or operations not visible in this excerpt.

It’s as if Cursor is cutting out a big chunk of my file before sending it to its servers. How can I prevent this? I do have Long Context Chat (Beta) enabled in Cursor settings. Isn’t this what Long Context Chat supposed to prevent?