SMA-2: each inverter is reached through a driver; GoodWe behaviour unchanged

app/drivers.py holds one Driver per roster entry (configured, actuator_id,
limits, read, write, release, probe, link_stale_s, batt_bound, settle_s, brand,
words). GoodWeEsphomeDriver makes the calls the code it replaced made, in the
same order. Inverter gets driver; has_writer, is_live and link_note read it. The
SoC/power read, the write, the device range (run_control, amain, the settings
panel), rule 2 per unit and the SAFETY-28 census go through it.

setpoint_entity is optional per entry beside driver, host, port, unit_id and
maintenance; only goodwe_esphome is selectable, the rest are checked and unused.

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

goodwe_controller/test_inverter.py

@@ -1536,8 +1536,9 @@ _decl9 = dict(ln.strip().lstrip("- ").split(": ", 1)
               for ln in _entry9.splitlines()[1:] if ": " in ln)
 print(f"    the shipped per-entry schema: {_decl9}")
 check("...and the schema half declares it as a LIST OF OBJECTS whose `name`, "
-      "`setpoint_entity`, `max_w` and `bms_soc_floor` are REQUIRED - no "
-      "trailing `?` - so the Supervisor refuses a half-written entry before the "
+      "`max_w` and `bms_soc_floor` are REQUIRED - no "
+      "trailing `?` (SMA-2: `setpoint_entity` is the GoodWe driver's own key "
+      "and optional here; rule 9(d) requires it per driver) - so the Supervisor refuses a half-written entry before the "
       "add-on sees it, and an entry can never fall back on a sibling's rating "
       "or on a sibling's BMS cut-out because there is no entry without one. "
       "⚠️ SAFETY-32 ADDED THE FOURTH ONE AS REQUIRED RATHER THAN AS "
@@ -1553,13 +1554,14 @@ check("...and the schema half declares it as a LIST OF OBJECTS whose `name`, "
       "refuses every options blob written before it existed",
       set(_decl9) == {"name", "setpoint_entity", "max_w", "bms_soc_floor",
                       "soc_entity", "batt_entity", "batt_invert",
-                      "capacity_kwh"}
+                      "capacity_kwh", "driver", "host", "port", "unit_id",
+                      "maintenance"}
       and not any(_decl9[k].endswith("?")
-                  for k in ("name", "setpoint_entity", "max_w",
-                            "bms_soc_floor"))
+                  for k in ("name", "max_w", "bms_soc_floor"))
       and all(_decl9[k].endswith("?")
-              for k in ("soc_entity", "batt_entity", "batt_invert",
-                        "capacity_kwh")))
+              for k in ("setpoint_entity", "soc_entity", "batt_entity",
+                        "batt_invert", "capacity_kwh", "driver", "host",
+                        "port", "unit_id", "maintenance")))
 
 # ⚠️ NOTHING IS INHERITED, AND THIS IS DEV-02 RESTATED AS A CONFIG RULE.
 # ⚠️ THE FLAT KEYS ARE SET TO REAL ENTITIES HERE, AND THAT IS THE WHOLE CHECK.