Populate redis

[jakubno]

Plan for migration:

1. Populate Redis with Sandbox data.
2. Read data from Redis, state transitions still in memory
3. State transitions and reservations in Redis

---

Note

Introduce a new pluggable sandbox store with Redis population, refactor orchestrator/handlers to use context-aware store APIs, and enable Redis in CI.

• Storage/State:
  • Introduce pluggable sandbox.Store wrapping Storage and ReservationStorage with context-aware APIs (Add/Get/Update/Remove/Reserve/Release, Sync).
  • Add memory backend sandbox/storage/memory and Redis backend sandbox/storage/redis (with redislock), plus populate_redis wrapper to mirror writes to Redis.
  • Add reservations package replacing in-memory reservations; comprehensive tests added.
  • Add JSON tags to sandbox.Sandbox.
• Orchestrator:
  • Wire new store; select Redis-backed storage when Redis client is present.
  • Update GetSandbox, create/keep-alive/delete flows to pass ctx and new store methods; handle add errors and cleanup; use store Sync from nodes; update evictor and team metrics to accept *sandbox.Store.
  • Adjust node sync (nodemanager.Node.Sync) to use store Sync.
• Handlers:
  • Pass ctx to orchestrator.GetSandbox across connect/get/pause/kill/resume.
• CI:
  • Start Redis in .github/actions/start-services/action.yml and export REDIS_URL.
• Deps:
  • Add github.com/bsm/redislock; keep go-redis usage.

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[linear]

ENG-3060 Make API service populate Redis store

[dobrac]

this PR is beautiful 🌸