ci: check for missing/blank poetry.lock and fetch from main

Co-Authored-By: Aaron <AJ> Steers <[email protected]>

.github/workflows/poetry-lock-command.yml

@@ -36,6 +36,17 @@ jobs:
         with:
           pr: ${{ github.event.inputs.pr }}
 
+      - name: Check for blank or missing poetry.lock
+        run: |
+          if [ ! -s "poetry.lock" ]; then
+            echo "poetry.lock missing or blank. Fetching from main branch..."
+            git fetch origin main
+            git checkout origin/main -- poetry.lock
+            echo "Lock file restored from main."
+          else
+            echo "poetry.lock found. Proceeding."
+          fi
+
       - name: Get PR info
         id: pr-info
         run: |