Fulltext implementation using Bleve (#2675)

Based on #2480

This actually indexes events based on their event type. They are removed
from the index if we receive a `m.room.redaction` event on the
`OutputRoomEvent` stream.
An admin endpoint is added to reindex all existing events.


Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>
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Till 2022-09-27 18:06:49 +02:00 committed by GitHub
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@ -140,12 +140,12 @@ room_server:
## Fulltext search
Dendrite supports experimental fulltext indexing using [Bleve](https://github.com/blevesearch/bleve), it is configured in the `sync_api` section as follows. Depending on the language most likely to be used on the server, it might make sense to change the `language` used when indexing, to ensure the returned results match the expections. A full list of possible languages can be found [here](https://github.com/blevesearch/bleve/tree/master/analysis/lang).
Dendrite supports experimental fulltext indexing using [Bleve](https://github.com/blevesearch/bleve), it is configured in the `sync_api` section as follows. Depending on the language most likely to be used on the server, it might make sense to change the `language` used when indexing, to ensure the returned results match the expectations. A full list of possible languages can be found [here](https://github.com/blevesearch/bleve/tree/master/analysis/lang).
```yaml
sync_api:
# ...
fulltext:
search:
enabled: false
index_path: "./fulltextindex"
language: "en"