Release 5.1.10

🔧 Maintenance

Network call optimizations

• Handle HTTP header Retry-After from responses from OneSignal (#2064)
• Avoid unnecessary user fetchs; on first app open and first login (#2061)
• Further improve batching by restarting OperationRepo's delay on every enqueue call (#2060)
  • Same "let the dust settle" strategy used to combine changes into fewer network calls as 4.x.x

🐛 Bug Fixes

• Handle incorrect 404 responses; add a delay after creates and retries on 404 of new ids (#2059)

📖 Documentation

• Update Readme and Migration_Guide with migration advisory (#2054)