Release v1.2.0

SemVer Minor - seit v1.1.0: DHCP-Pool-Haenger gefixt (SSHTransport-
Timeout, bugs.md #11), Experte-Tab-Port-Konflikt-Pruefung (bugs.md #12,
neue Faehigkeit). Beides live vom Nutzer bestaetigt. Build + alle
111 Unit-Tests gruen.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

project.yml

@@ -35,8 +35,8 @@ targets:
         # generate` silently resets the app's version back to its built-in default
         # "1.0"/"1", discarding any release version bump (found live, 2026-09-17,
         # while adding a new test file triggered a regen and reverted v1.1.0 -> 1.0).
-        CFBundleShortVersionString: "1.1.0"
-        CFBundleVersion: "2"
+        CFBundleShortVersionString: "1.2.0"
+        CFBundleVersion: "3"
         LSApplicationCategoryType: public.app-category.utilities
         NSAppTransportSecurity:
           NSAllowsArbitraryLoads: true