Mention that document deletion by filter cannot be autobatched with anything else

[irevoire]

Hey,

We had a few issues from OSS users and clients in the past that comes down to the fact that they were mixing document addition and document delete by filter.
But these two operations can’t autobatch together and often lead to the engine being super slow to process everything.

I think we should mention somewhere in the doc (maybe with a warning?) that the document deletion by filter operation is meant to be used « occasionally », if you need to remove documents quickly you should favor as much as possible the following route;

• delete document by id
• delete documents by batch

For context, here’s the discussion that motivated this issue: https://meilisearch.slack.com/archives/C03T1T47TUG/p1741088222390079?thread_ts=1741081994.890719&cid=C03T1T47TUG [internal link]

[guimachiavelli]

We need to contact support to see how often this comes up in support requests to define a priority level. Leaning towards High.