feat(STATE-WP-0064): start parallel week with source-tagged sweep runners

Tag consistency_sweep_remote_all progress events by source, route the local
timer through the API, add a parallel-week comparison script, and document
the 2026-06-21 to 2026-06-28 observation window for T03.

api/routers/consistency_sweep.py

@@ -25,7 +25,11 @@ async def sweep_remote_all(
     session: AsyncSession = Depends(get_session),
 ) -> ConsistencySweepRemoteAllRun:
     try:
-        return await run_remote_all_sweep(session, max_seconds=body.max_seconds)
+        return await run_remote_all_sweep(
+            session,
+            max_seconds=body.max_seconds,
+            source=body.source,
+        )
     except json.JSONDecodeError as exc:
         raise HTTPException(
             status_code=500,