fix(remote): resolve remembered explicit-port endpoints

- Resolve bare remote hosts through the remote registry when one explicit port is stored.
- Preserve bare host behavior when no unique explicit-port registry match exists.
- Route requested remote targets through the new registry resolver.
- Add registry tests for unique and ambiguous explicit-port matches.
- Bump package and extension versions to 0.16.6.

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "real-browser-cli"
-version = "0.16.5"
+version = "0.16.6"
 description = "Control your real running browser from the terminal or Python SDK"
 readme = "README.md"
 license = { file = "LICENSE" }