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>

halkyon_learn_flutter/pubspec.yaml

@@ -86,9 +86,9 @@ dependencies:
     git:
       url: https://code.halkyon.app/project-halkyon/pure-zstd.git
       ref: 596b63d5741d479073fbfc78377cc7dbdd342da3
-  serverpod_auth_idp_flutter: 4.0.3
-  serverpod_flutter: 4.0.3
-  serverpod_offline_sync_client: 0.0.8
+  serverpod_auth_idp_flutter: 4.0.4
+  serverpod_flutter: 4.0.4
+  serverpod_offline_sync_client: 0.0.10
   # Anki collections are SQLite databases (the sync engine already bundles it).
   sqlite3: ^3.6.0
   url_launcher: ^6.3.2
@@ -112,7 +112,7 @@ dev_dependencies:
     sdk: flutter
   # The sync tests (test/sync/) sign in like the app and read the server's database.
   postgres: ^3.5.16
-  serverpod_auth_core_client: 4.0.3
+  serverpod_auth_core_client: 4.0.4
   yaml: ^3.1.4
 
 dependency_overrides: