fix: Serverpod v4.0.4 and serverpod_offline_sync v0.0.10

serverpod_offline_sync v0.0.10 collects outbound changes in one
consistent snapshot, so a sync no longer fails on writes made while it
runs (upstream #84, #163), keeps checkpoints per author, so a device
clock moving backwards no longer stalls sync or resends data, and keeps
unique conflicts and foreign key defaults alike on every device. Its
tables and its messages are unchanged: no migration, and apps on v0.0.8
keep syncing. It needs Serverpod >=4.0.4 <4.1.0 (v4.0.4 is fixes only),
so the root overrides that held the workspace on one Serverpod go: each
package pins v4.0.4 itself. The generated code is identical under the
v4.0.4 CLI, which CI now uses.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMm7usAo6q9ZZRoPkWjoxi
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

README.md

@@ -37,7 +37,7 @@ Targets: Linux, Windows, macOS, Android and iOS. There is no web build.
   [Android](https://docs.flutter.dev/platform-integration/android/setup),
   [macOS](https://docs.flutter.dev/platform-integration/macos/setup),
   [iOS](https://docs.flutter.dev/platform-integration/ios/setup).
-- **The Serverpod CLI v4.0.3**: `dart install serverpod_cli@4.0.3`. Pass `--no-analytics`
+- **The Serverpod CLI v4.0.4**: `dart install serverpod_cli@4.0.4`. Pass `--no-analytics`
   to every call; otherwise it reports the commands run to Serverpod.
 - **Linux**, on top of Flutter's packages, the libraries of three plugins: WebKitGTK
   (pulled in by the sign-in package), libsecret (keeps the session) and GStreamer