Tell us about the problem you're trying to solve

To make schema discovery faster #8491 limited the schema discovery step to the analysis of 10k records.
Some users might have heterogenous schema spanning on more than this hardcoded limit.

Describe the solution you’d like

We could expose DISCOVER_LIMIT as a parameter in the source configuration to allow users to customize this value, or choose to read all documents in the discovery step.

Describe the alternative you’ve considered or used

Downgrade to version 0.1.8

Additional context

Requested by a user in this Slack conversation