🔧(e2e) improve e2e test debugging and db cleanup

Preserve django_site table during e2e db clearing to
avoid breaking site configuration. Add video recording
on first retry and screenshot capture on failure for
easier debugging of flaky tests.

bin/clear_db_e2e.sql

@@ -1,7 +1,7 @@
 DO $$
 DECLARE r RECORD;
 BEGIN
-    FOR r IN (SELECT tablename FROM pg_tables WHERE schemaname = 'public' AND tablename != 'django_migrations')
+    FOR r IN (SELECT tablename FROM pg_tables WHERE schemaname = 'public' AND tablename != 'django_migrations' AND tablename != 'django_site')
     LOOP
         RAISE NOTICE 'Truncating table %', r.tablename;
         EXECUTE 'TRUNCATE TABLE ' || quote_ident(r.tablename) || ' CASCADE';

src/frontend/apps/e2e/playwright.config.ts

@@ -29,6 +29,8 @@ export default defineConfig({
 
     /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
     trace: "on-first-retry",
+    video: 'on-first-retry',
+    screenshot: 'only-on-failure',
   },
 
   webServer: {