Fix row count extraction in CI workflow

Change row count verification command to extract the correct count from the output.

Author: MattOates

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
           
           # Verify that data was actually loaded by checking row count
           echo "Verifying demo data was loaded..."
-          row_count=$(docker compose exec -T ducklake-init duckdb -c "SELECT COUNT(*) FROM the_ducklake.gene;" | tail -n 1 | tr -d ' ')
+          row_count=$(docker compose exec -T ducklake-init duckdb -c "SELECT COUNT(*) FROM the_ducklake.gene;" | tail -n 2 | head -n 1 | \grep -Eo '\d+')
           echo "Found $row_count rows in gene table"
           
           # Ensure we have a reasonable number of rows (gene data should have thousands)
@@ -52,4 +52,4 @@ jobs:
 
       - name: Clean up
         if: always()
-        run: make down
+        run: make down