fix(gateway): restore multiplex secondary adapters

Partial cherry-pick of a7ffbbff7 from PR #63256: secondary-profile
adapter creation errors no longer abort the whole secondary startup
(try/except around _create_adapter + loud warning on None return), and
Home Assistant's check_ha_requirements() becomes dep-only with the
credential moved to a new validate_ha_config() so secondary profiles
whose HASS_TOKEN lives in the profile secret scope are not silently
dropped by the registry gate.

Telegram diagnostic hunks and profile-label stamping dropped: the
regression they targeted does not exist on current main and they
conflict with the connect() teardown fence.

gateway/run.py

@@ -8828,9 +8828,24 @@ class GatewayRunner(GatewayAuthorizationMixin, GatewayKanbanWatchersMixin, Gatew
                     f"'{profile_name}'s config.yaml (configure it only on the "
                     f"default profile)."
                 )
-            with _profile_runtime_scope(profile_home):
-                adapter = self._create_adapter(platform, platform_config)
+            try:
+                with _profile_runtime_scope(profile_home):
+                    adapter = self._create_adapter(platform, platform_config)
+            except Exception as e:
+                logger.error(
+                    "[MULTIPLEX] Profile '%s': _create_adapter('%s') raised %s",
+                    profile_name,
+                    platform.value,
+                    e,
+                    exc_info=True,
+                )
+                continue
             if not adapter:
+                logger.warning(
+                    "[MULTIPLEX] Profile '%s': skipping platform '%s' - adapter creation returned None",
+                    profile_name,
+                    platform.value,
+                )
                 continue
 
             # Same-token conflict detection — refuse a duplicate poll.

plugins/platforms/homeassistant/adapter.py

@@ -40,12 +40,14 @@ logger = logging.getLogger(__name__)
 
 
 def check_ha_requirements() -> bool:
-    """Check if Home Assistant dependencies are available and configured."""
-    if not AIOHTTP_AVAILABLE:
-        return False
-    if not os.getenv("HASS_TOKEN"):
-        return False
-    return True
+    """Check if Home Assistant runtime dependencies are available."""
+    return bool(AIOHTTP_AVAILABLE)
+
+
+def validate_ha_config(config: PlatformConfig) -> bool:
+    """Accept either a scoped config token or an env-provided HASS_TOKEN."""
+    token = getattr(config, "token", None) or os.getenv("HASS_TOKEN", "")
+    return bool(str(token or "").strip())
 
 
 class HomeAssistantAdapter(BasePlatformAdapter):
@@ -560,6 +562,7 @@ def register(ctx) -> None:
         label="Home Assistant",
         adapter_factory=_build_adapter,
         check_fn=check_ha_requirements,
+        validate_config=validate_ha_config,
         is_connected=_is_connected,
         required_env=["HASS_TOKEN"],
         install_hint="pip install aiohttp",

tests/gateway/test_homeassistant.py

@@ -17,6 +17,7 @@ from gateway.config import (
 from plugins.platforms.homeassistant.adapter import (
     HomeAssistantAdapter,
     check_ha_requirements,
+    validate_ha_config,
 )
 
 
@@ -26,12 +27,8 @@ from plugins.platforms.homeassistant.adapter import (
 
 
 class TestCheckRequirements:
-    def test_returns_false_without_token(self, monkeypatch):
+    def test_returns_true_when_aiohttp_present(self, monkeypatch):
         monkeypatch.delenv("HASS_TOKEN", raising=False)
-        assert check_ha_requirements() is False
-
-    def test_returns_true_with_token(self, monkeypatch):
-        monkeypatch.setenv("HASS_TOKEN", "test-token")
         assert check_ha_requirements() is True
 
     @patch("plugins.platforms.homeassistant.adapter.AIOHTTP_AVAILABLE", False)
@@ -40,6 +37,20 @@ class TestCheckRequirements:
         assert check_ha_requirements() is False
 
 
+class TestValidateConfig:
+    def test_returns_false_without_token_in_config_or_env(self, monkeypatch):
+        monkeypatch.delenv("HASS_TOKEN", raising=False)
+        assert validate_ha_config(PlatformConfig(enabled=True)) is False
+
+    def test_returns_true_with_token_in_env(self, monkeypatch):
+        monkeypatch.setenv("HASS_TOKEN", "test-token")
+        assert validate_ha_config(PlatformConfig(enabled=True)) is True
+
+    def test_returns_true_with_token_in_config(self, monkeypatch):
+        monkeypatch.delenv("HASS_TOKEN", raising=False)
+        assert validate_ha_config(PlatformConfig(enabled=True, token="cfg-token")) is True
+
+
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