chore: correct release version to 2.0.0

PSR picked v1.0.0 lineage and published 1.1.0; stable line is 2.0.0 from rc.4.

README.md

@@ -1,6 +1,6 @@
 # ADN DMR Peer Server
 
-**Version 1.1.0** — pairs with **adn-monitor 2.0.0** (report v2 slim wire + JSON HELLO).
+**Version 2.0.0** — pairs with **adn-monitor 2.0.0** (report v2 slim wire + JSON HELLO).
 
 ADN DMR conference bridge server. Configuration is YAML; the codebase follows clean architecture (domain, application, infrastructure). v2 adds integrated **PROXY**, **SubscriptionStore** routing, report v2 to the monitor, and a unified **`adn-server.py`** entrypoint (`--echo`, `--doctor`, `--no-proxy`). See [CHANGELOG.md](CHANGELOG.md).
 

pyproject.toml

@@ -8,7 +8,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "adn-server"
-version = "1.1.0"
+version = "2.0.0"
 description = "ADN DMR Peer Server"
 readme = "README.md"
 license = { text = "GPL-3.0-or-later" }