Cannot download tornadoes_report.pdf

In `04-multi-modal-rag/text-images-rag-using-kb/text_images_rag_using_kb.ipynb` cannot download the source file `https://sgp.fas.org/crs/misc/IF12695.pdf` as the request returns HTTP code 202 Accepted.

I tried with wget and received a 0 bytes file:

```
!wget https://sgp.fas.org/crs/misc/IF12695.pdf --no-check-certificate -O ./mm-data/tornadoes_report.pdf
--2025-09-29 05:18:43-- https://sgp.fas.org/crs/misc/IF12695.pdf
Resolving sgp.fas.org (sgp.fas.org)... 99.84.66.25, 99.84.66.23, 99.84.66.92, ...
Connecting to sgp.fas.org (sgp.fas.org)|99.84.66.25|:443... connected.
HTTP request sent, awaiting response... 202 Accepted
Length: 0 [text/html]
Saving to: ‘./mm-data/tornadoes_report.pdf’

./mm-data/tornadoes [ <=> ] 0 --.-KB/s in 0s

2025-09-29 05:18:43 (0.00 B/s) - ‘./mm-data/tornadoes_report.pdf’ saved [0/0]
```

I was able to download the file using a browser, but not programmatically.

Inspect 04-multi-modal-rag/text-images-rag-using-kb/text_images_rag_using_kb.ipynb and locate the cell that downloads IF12695.pdf into mm-data/tornadoes_report.pdf. Reproduce the 202 Accepted response, then test a reliable retrieval approach for the same source; done means the notebook obtains a nonempty PDF at the expected path.

Written by the indexing model from the issue text.