Update TLS session management tasks in README

Author: gnarzilla

README.md

@@ -381,9 +381,11 @@ See [docs/EXTENDING.md](docs/EXTENDING.md) for details.
 - [x] REST API with email sending
 - [x] Federation system (experimental)
 - [x] Connection pool metrics
+- [x] Connection pool with TLS session reuse
 - [x] Blog caching with offline fallback
 - [x] Server-Sent Events for real-time dashboard
 - [ ] API rate limiting tested & vetted
+- [ ] Deeper TLS session management for pooled connections
 
 ### Medium-term (late 2026)
 - [ ] Dynamic plugin loading (no rebuild required)