docs: update docs for the key/value redis adapter and s3 compatible adapter

AdminForth/1735/kv-adapters-and-storage-s3-com

Author: yaroslav8765

adminforth/documentation/docs/tutorial/06-Adapters/04-storage-adapters.md

@@ -22,7 +22,7 @@ pnpm add @adminforth/storage-adapter-s3-compatible
 ```
 
 Provides S3 compatible interface for object storage services such as MinIO, Wasabi, Cloudflare R2 or other third-party S3 providers.
-### How the adapter works:
+### How the adapter works
 
 The Amazon S3 adapter uses tagging to mark objects with the special tag `adminforth-candidate-for-cleanup`, and then creates a lifecycle rule that automatically expires objects with that tag.
 But not all S3-compatible adapters support tagging, so this adapter has a built-in cleanup mechanism and you have two options:
@@ -51,6 +51,16 @@ If you don't want to use a key/value adapter and you don't need to clean up file
 
 > If somebody uploaded a file and didn't save the record, you will pay for the storage until the file is removed manually
 
+### Choosing Key/value adapter
+
+Since the adapter uses a key/value adapter to store keys for deletion, it is important to use persistent storage, so the data will be safe:
+
+- (⛔️) [RAM adapter](07-key-value-adapters.md#ram-adapter) - not recommended, because after a server restart all data will be lost
+- (✅) [Redis adapter](07-key-value-adapters.md#redis-adapter) - Redis itself stores data in-memory, but you can set it up to write data to an `.rdb` file so the database is restored on server restart. However, it requires regular database snapshots and persistent Docker storage setup
+- (✅✅) [LevelDB adapter](07-key-value-adapters.md#leveldb-adapter) - can be used, but you need to set up persistent storage in your Docker container, so data won't be lost between restarts
+- (✅✅✅) [Resource adapter](07-key-value-adapters.md#resource-based-adapter) - uses a database to store key/value pairs, so data will be safe between restarts, but you need to create an extra table for this storage
+
+
 ### Cloudflare R2 setup example
 
 This adapter requires key/value adapter. For example, we will be using levelDb adapter.

adminforth/documentation/docs/tutorial/06-Adapters/07-key-value-adapters.md

@@ -36,7 +36,7 @@ Redis uses in-memory storage with $O(1)$ get complexity. It is a great fit for l
 import RedisKeyValueAdapter from '@adminforth/key-value-adapter-redis';
 
 const adapter = new RedisKeyValueAdapter({
-  redisUrl: 'redis://localhost:6379',
+  redisUrl: 'redis://localhost:6379/0', // where "/0" - is database number from 0 to 15; Redis can have up to 16 databases"
 });
 
 adapter.set('test-key', 'test-value', 120);