Move domain extractors and collect_snapshot into data_model.py

we_connect.py now only handles WeConnect login and vehicle selection.
All extract_*() functions, ALL_DOMAINS, and collect_snapshot() live
in data_model.py alongside the store and value helpers.

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

collect.py

@@ -58,8 +58,7 @@ from pathlib import Path
 import log_config
 import network
 import we_connect
-from data_model import auto_out_path, load_store, save_store
-from we_connect import ALL_DOMAINS
+from data_model import ALL_DOMAINS, auto_out_path, collect_snapshot, load_store, save_store
 
 log = logging.getLogger(__name__)
 
@@ -118,7 +117,7 @@ def run(args: argparse.Namespace) -> None:
 
             try:
                 wc.update()
-                snapshot = we_connect.collect_snapshot(vehicle, domains)
+                snapshot = collect_snapshot(vehicle, domains)
                 store["records"].append(snapshot)
                 save_store(out, store, args.max_records)
                 network.broadcast(snapshot, push_clients, push_lock)