docs: update README and changelog for v2026.4.350 release}
- Add Docker HEALTHCHECK and graceful shutdown documentation to README
- Document Kubernetes liveness and readiness probe endpoints
(/health and /health?ready=true) in README
- Expand v2026.4.350 changelog with detailed feature descriptions:
real-time monitoring tabs (Pulse, Profiler, PubSub),
RedisTimeSeries visualization with uPlot charts,
data format toggle (Raw/JSON/Hex/Base64),
AI console input replacement,
Docker health check and K8s probes,
bulk delete, stream field-value display,
connection resilience with auto-reconnect,
and tree level expand
- Note removal of all license validation code (REFACTOR)