chore: remove unused Redis service and references (#26)

apps/pwa/playwright.config.ts

@@ -5,7 +5,7 @@
  * Auth: DEV_AUTH_BYPASS=true on the API (never storageState — D-01/Pitfall 14)
  * SW: serviceWorkers: 'block' on all profiles (D-02/Pitfall 15)
  * baseURL: env-driven PLAYWRIGHT_BASE_URL (D-08/Rule 8)
- * webServer: manages Vite only — API+MariaDB+Redis stay compose-managed (D-10)
+ * webServer: manages Vite only — API+MariaDB stay compose-managed (D-10)
  *
  * Run:
  *   pnpm --filter @familysync/pwa test:e2e
@@ -63,7 +63,7 @@ export default defineConfig({
     },
   ],
 
-  // D-10: manage Vite only; API+MariaDB+Redis are compose-managed
+  // D-10: manage Vite only; API+MariaDB are compose-managed
   // reuseExistingServer: reuse operator's pnpm dev locally; start fresh in CI
   webServer: {
     command: 'pnpm --filter @familysync/pwa dev',