ci: G11.5 resolved — onboard windy-pro; cloud cells + windytalk; promote script

- import_from_github.py no longer refuses windy-pro: lane 8c audited all
  14 checkouts (WINDYPRO_CHECKOUTS.md), GitHub main is canonical.
- sync + bridge: windy-cloud-domains, windy-cloud-vps, windytalk (default
  branch master), windy-pro; windy-cloud-sites added to the bridge (it was
  synced but never bridged).
- scripts/promote_to_ci.sh: the mirror->writable procedure as one script,
  with the delete-before-import hazard documented.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/pr_status_bridge.py

@@ -47,7 +47,8 @@ REPOS = os.environ.get(
     "BRIDGE_REPOS",
     "windy-chat windy-mail windy-calendar Windy-Clone WindyCloud windy-search windy-connect"
     " windy-drops windy-code-web windy-code windy-traveler windy-registry eternitas"
-    " windy-translate windytranslate-site windytraveler-site windy-hand",
+    " windy-translate windytranslate-site windytraveler-site windy-hand"
+    " windy-cloud-sites windy-cloud-domains windy-cloud-vps windytalk windy-pro",
 ).split()
 
 # Gitea run status -> GitHub status state. `skipped` is deliberately absent: a