Fix feature flag cleanup API key

Co-Authored-By: Oz <oz-agent@warp.dev>

Author: captainsafia

.github/workflows/feature_flag_cleanup.yml

@@ -63,7 +63,7 @@ jobs:
               * "date_enabled" - the date on which the feature flag was enabled by default
               * "enabling_commit" - the Git commit in which the feature flag was enabled by default
             * You are running as part of a GitHub automation and must not commit or push any changes. Another agent will process the file you produce.
-          warp_api_key: ${{ secrets.WARP_API_KEY }}
+          warp_api_key: ${{ secrets.OSS_WARP_API_KEY }}
           share: team
 
       - name: Upload feature flag log
@@ -87,6 +87,33 @@ jobs:
           flag_name=""
           cargo_flag=""
 
+          find_existing_cleanup_pr() {
+            local branch="$1"
+            local error_log
+            error_log="$(mktemp)"
+
+            for attempt in 1 2 3; do
+              if gh api \
+                --method GET \
+                "repos/${{ github.repository }}/pulls" \
+                -f state=open \
+                -f "head=${{ github.repository_owner }}:$branch" \
+                --jq '.[0].number // ""' 2>"$error_log"; then
+                rm -f "$error_log"
+                return 0
+              fi
+
+              if [ "$attempt" = "3" ]; then
+                cat "$error_log" >&2
+                rm -f "$error_log"
+                return 1
+              fi
+
+              echo "PR lookup failed for $branch, retrying..." >&2
+              sleep $((attempt * 5))
+            done
+          }
+
           # Iterate flags in order (oldest first) and pick the first one that is not
           # excluded and does not already have an open cleanup PR. Sort by
           # date_enabled here rather than relying on the analysis agent to emit
@@ -101,7 +128,7 @@ jobs:
             fi
 
             candidate_branch="oz-agent/cleanup-feature-flag-$candidate_flag"
-            existing_pr="$(gh pr list --state open --head "$candidate_branch" --json number --jq '.[0].number')"
+            existing_pr="$(find_existing_cleanup_pr "$candidate_branch")"
             if [ -n "$existing_pr" ] && [ "$existing_pr" != "null" ]; then
               echo "Skipping $candidate_flag: open cleanup PR #$existing_pr already exists on $candidate_branch"
               continue
@@ -178,7 +205,7 @@ jobs:
 
             You are running as part of a GitHub automation that runs with a read-only token and will package your changes into a patch for a separate job to commit. Do not create a branch, do not commit, do not push, do not create a PR, and do not call `gh`. Leave your changes in the working tree only.
           share: team
-          warp_api_key: ${{ secrets.WARP_API_KEY }}
+          warp_api_key: ${{ secrets.OSS_WARP_API_KEY }}
 
       - name: Generate cleanup patch
         env: