Eagerly pre-load today's disk records into push_store_ref at startup

Previously load_today() was only called if in-memory records were empty,
which was never true once the first WeConnect poll had completed.
Now disk records are loaded unconditionally at startup and merged with
live in-memory records (dedup by ts) when a client connects.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

collect.py

@@ -93,10 +93,11 @@ def run(args: argparse.Namespace) -> None:
         logs_dir.mkdir(exist_ok=True)
         out = auto_out_path(logs_dir, vin)
 
-    load_today = (lambda: load_today_records(logs_dir, vin)) if logs_dir else None
-    push_clients, push_lock, push_store_ref = network.start_push_server(
-        args.host, args.port, load_today=load_today
-    )
+    push_clients, push_lock, push_store_ref = network.start_push_server(args.host, args.port)
+    if logs_dir is not None:
+        push_store_ref["preloaded"] = load_today_records(logs_dir, vin)
+        if push_store_ref["preloaded"]:
+            log.info("Pre-loaded %d record(s) from today's log files", len(push_store_ref["preloaded"]))
 
     current_day = datetime.now(timezone.utc).date()
     store = load_store(out, vin, args.interval)