Added support for RedisKvStore for Fedify

[allouis]

Fedify uses the KvStore a lot and often with an expiry. Currently the MySQL backed KVStore can get overwhelmed with a lot of inserts, which can cause connections to be dropped which affects uptime for the core application. Redis also supports TTL out of the box, so this eradicates the need for a cleanup job running on the key_value table.

[coderabbitai]

Walkthrough

The changes introduce Redis as an optional key-value store for the application, configurable via environment variables. The docker-compose.yml file is updated to define new Redis services for both production and testing environments, including persistent storage volumes and health checks. The activitypub and activitypub-testing services are configured to connect to their respective Redis instances with updated environment variables and service dependencies. Migration services now depend on successful completion of dependent services. The dependency injection setup in the codebase is modified to instantiate either a Redis-based or MySQL-based key-value store based on the FEDIFY_KV_STORE_TYPE environment variable. The package.json is updated to add Redis client libraries @fedify/redis and ioredis as dependencies.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~15–20 minutes

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• src/configuration/registrations.ts (3 hunks)

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• src/configuration/registrations.ts

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