cli/sync(refactor[typing]): Use JsonValue for sync events

why: Clarify JSON payload typing for per-repo sync events.

what:
- Type sync event payload dict with JsonValue entries

Author: tony

src/vcspull/cli/sync.py

@@ -33,6 +33,7 @@
 from ._colors import Colors, get_color_mode
 from ._output import (
     JsonObject,
+    JsonValue,
     OutputFormatter,
     OutputMode,
     PlanAction,
@@ -719,7 +720,7 @@ def silent_progress(output: str, timestamp: datetime) -> None:
 
         summary["total"] += 1
 
-        event: dict[str, t.Any] = {
+        event: dict[str, JsonValue] = {
             "reason": "sync",
             "name": repo_name,
             "path": display_repo_path,