Record GitHub branch protection blocker

AGRARIAN_DEVELOPMENT_ROADMAP.md

@@ -168,7 +168,7 @@ Major version 0.01 work already completed:
 Remaining version 0.01 cleanup before moving deeper into new gameplay:
 
 - [ ] Decide whether to keep current Unreal template variants or remove unused starter variants.
-- [ ] Create protected `main` branch.
+- [!] Create protected `main` branch. Blocked while the repo remains private on the current GitHub plan; GitHub API reports this requires GitHub Pro or making the repository public.
 - [?] Decide whether to create/use a long-lived `dev` branch.
 - [~] Finish branch naming and commit message conventions.
 - [ ] Define backup expectations for NAS and repository.
@@ -191,7 +191,7 @@ Goal: Prepare the project so all future development is controlled, recoverable,
 - [x] Create `.gitignore` for Unreal Engine.
 - [x] Ensure `Binaries/`, `Intermediate/`, `Saved/`, and `DerivedDataCache/` are excluded unless intentionally needed.
 - [x] Commit clean baseline project.
-- [ ] Create protected `main` branch.
+- [!] Create protected `main` branch. Blocked while the repo remains private on the current GitHub plan; GitHub API reports this requires GitHub Pro or making the repository public.
 - [?] Create `dev` branch if we want staging before main.
 - [~] Define branch naming conventions.
 - [~] Define commit message conventions.
@@ -1396,7 +1396,7 @@ Current version: `0.01 Foundation Baseline`
 
 Earliest incomplete foundation items:
 
-- [ ] Create protected `main` branch.
+- [!] Create protected `main` branch. Blocked while the repo remains private on the current GitHub plan; GitHub API reports this requires GitHub Pro or making the repository public.
 - [?] Decide whether to create/use a long-lived `dev` branch.
 - [~] Finish branch naming conventions.
 - [~] Finish commit message conventions.
@@ -1417,4 +1417,4 @@ Earliest incomplete foundation items:
 
 Immediate next item:
 
-- [ ] Create protected `main` branch.
+- [?] Decide whether to create/use a long-lived `dev` branch.