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)