ci(branch-protection): let code owners bypass required PR review (#154)

require_code_owner_reviews + count=1 with no bypass meant EVERY PR needed a
code-owner approval — including code owners' own PRs, which can't be
self-approved, so an owner's PR deadlocked on the other owner (forcing admin
overrides). Intended behavior: review is required only for non-owners.

Add bypass_pull_request_allowances for the two engineering owners (ragnorc,
aaltshuler): they merge their own PRs after CI without a second review;
non-owners still require a code-owner approval. CI status checks remain
required for everyone. Applied live via scripts/apply-branch-protection.sh.

Note: the bypass list mirrors codeowners-roles.yml engineering members by hand
(render-codeowners.py doesn't generate it) — keep in sync on owner changes.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.github/branch-protection.json

@@ -1,5 +1,5 @@
 {
-  "_comment": "Branch protection policy for main. Applied via scripts/apply-branch-protection.sh. See docs/branch-protection.md for rationale.",
+  "_comment": "Branch protection policy for main. Applied via scripts/apply-branch-protection.sh. See docs/branch-protection.md for rationale. NOTE: bypass_pull_request_allowances.users must mirror the engineering owners in .github/codeowners-roles.yml — code owners merge their own PRs without a second review; non-owners still need a code-owner approval. (render-codeowners.py does NOT generate this list; keep it in sync by hand.)",
   "required_status_checks": {
     "strict": true,
     "contexts": [
@@ -17,7 +17,12 @@
     "dismiss_stale_reviews": true,
     "require_code_owner_reviews": true,
     "required_approving_review_count": 1,
-    "require_last_push_approval": false
+    "require_last_push_approval": false,
+    "bypass_pull_request_allowances": {
+      "users": ["ragnorc", "aaltshuler"],
+      "teams": [],
+      "apps": []
+    }
   },
   "restrictions": null,
   "required_linear_history": true,