MAINT-10: maintenance start hour in local time, default 19:00

The start hour was compared with the UTC hour, so the shipped 10 started at
12:00 in a Belgian summer. It is now read in Home Assistant's time zone
(fallback: the container's TZ, then UTC, one log line says which), and the
default moves to 19. DST: a missing hour starts at the first hour after the
jump; a repeated hour starts only in its first pass. Stored options are not
rewritten: a saved 10 now means 10:00 local (DOCS, CHANGELOG).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

goodwe_controller/test_home.py

@@ -400,6 +400,15 @@ check("...with its duration from the battery's capacity and the cycle's rates "
       "and hold time",
       present(nth(_cyc)) and _cyc[0]["amount"].startswith("Takes about ")
       and _cyc[0]["end_h"] > _cyc[0]["start_h"] + 2)
+# MAINT-10: with the site's zone set, the hour is read on the local clock.
+from app.tariff import _EUTimezone                              # noqa: E402
+c_ml = make(dict(MAINT, maintenance_start_hour=14))
+for _mm in c_ml.maints:
+    _mm.tz = _EUTimezone()
+_cyc_l = [r for r in status(c_ml)["plan"]["runs"] if r["kind"] == "cycle"]
+check("MAINT-10: start hour 14 in the local zone is drawn at 14:00, the "
+      "instant the cycle starts", len(_cyc_l) == 1
+      and field(nth(_cyc_l), "from") == "14:00")
 c_m.maints[0].store.set("phase", "drain")
 s_md = status(c_m)
 check("a cycle under way is drawn from now, and the battery's now line says "