Tesla charge_limit_soc = strop, ne cíl session

Patch po příjezdu přepisoval target_soc_pct limitem auta (LFP 100 %) a
zahazoval kaskádu fn_ev_session_defaults (default vozidla 30 %) — auto by
se v noci tlačilo do plna ze sítě proti vůli majitele (session #2 dnes).
Nově se target snižuje jen pokud je limit auta POD ním;
fn_tesla_arrival_context vrací i target_soc_pct session.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

backend/services/telemetry_collector.py

@@ -216,8 +216,13 @@ async def _patch_session_from_tesla(
         )
 
     patch: dict = {"soc_at_connect_pct": state["battery_level"]}
-    if state.get("charge_limit_soc"):
-        patch["target_soc_pct"] = state["charge_limit_soc"]
+    # Tesla charge_limit_soc je STROP (nad něj auto nenabije), NE cíl —
+    # cíl drží kaskáda fn_ev_session_defaults (weekly/forecast/default
+    # vozidla, např. 30 %). Snižovat target jen když limit auta je POD ním.
+    limit = state.get("charge_limit_soc")
+    current_target = ctx.get("target_soc_pct")
+    if limit and current_target is not None and float(current_target) > float(limit):
+        patch["target_soc_pct"] = limit
     import json as _json
     await fetch_json(
         conn,

db/routines/R__095_fn_tesla.sql

@@ -49,13 +49,14 @@ as $fn$
     'vin', v.vin,
     'battery_capacity_kwh', v.battery_capacity_kwh,
     'session_id', s.id,
-    'soc_at_connect_pct', s.soc_at_connect_pct
+    'soc_at_connect_pct', s.soc_at_connect_pct,
+    'target_soc_pct', s.target_soc_pct
   ), '{}'::jsonb)
   from ems.asset_ev_charger c
   join ems.asset_vehicle v
     on v.site_id = c.site_id and v.default_charger_id = c.id and v.active
   left join lateral (
-    select es.id, es.soc_at_connect_pct
+    select es.id, es.soc_at_connect_pct, es.target_soc_pct
     from ems.ev_session es
     where es.charger_id = c.id and es.session_end is null
     order by es.id desc