Prompt: LLMs emit URLs that do not exist

## Problem

LLMs hallucinate, in this case about URLs. The question was:

> "CrateDB does not seem to provide an AUTOINCREMENT feature?"

## Details

Both text fragments include URLs that don't exist, or are wrong. The correct URL would be https://cratedb.com/docs/guide/performance/inserts/sequences.html.

> CrateDB does not offer automatic incrementing IDs due to distributed scaling concerns. Use UUIDs, timestamps, or an application-managed sequence as needed. See the [CrateDB documentation: Autogenerated sequences and PRIMARY KEY values](https://cratedb.com/docs/crate/howtos/en/latest/data-modeling/sequences.html) for examples and best practices.

> [CrateDB: Autogenerated sequences and PRIMARY KEY values](https://cratedb.com/docs/crate/howtos/en/latest/getting-started/autogenerated-sequences.html)

> [CrateDB Community: Sequences in distributed databases](https://community.cratedb.com/t/how-to-work-with-primary-key-auto-increment-in-cratedb/957)

## Reproduce

The command was:

```sh
uvx llm --model gpt-4.1 \
--fragment https://cdn.crate.io/about/v1/llms-full.txt \
--system-fragment https://cdn.crate.io/about/v1/instructions-general.md \
"CrateDB does not seem to provide an AUTOINCREMENT feature?"
```

Start by running the provided uvx llm command with the listed model and fragment URLs, then inspect the source behind https://cdn.crate.io/about/v1/llms-full.txt and its instructions fragment. Trace where the incorrect CrateDB links are supplied or generated. Done means the response points to https://cratedb.com/docs/guide/performance/inserts/sequences.html rather than the nonexistent URLs.

Written by the indexing model from the issue text.