Fix _docs_helpers.py import error in CI

- Add try/except for relative vs absolute imports in _docs_helpers.py
- Remove silent error handling in docs workflow (fail on error)

The relative import fails when markdown-code-runner executes the code
directly via sys.path.insert. The fallback to absolute import fixes this.

custom_components/adaptive_lighting/_docs_helpers.py

@@ -5,14 +5,24 @@ import pandas as pd
 import voluptuous as vol
 from homeassistant.helpers import selector
 
-from .const import (
-    DOCS,
-    DOCS_APPLY,
-    DOCS_MANUAL_CONTROL,
-    SET_MANUAL_CONTROL_SCHEMA,
-    VALIDATION_TUPLES,
-    apply_service_schema,
-)
+try:
+    from .const import (
+        DOCS,
+        DOCS_APPLY,
+        DOCS_MANUAL_CONTROL,
+        SET_MANUAL_CONTROL_SCHEMA,
+        VALIDATION_TUPLES,
+        apply_service_schema,
+    )
+except ImportError:
+    from const import (
+        DOCS,
+        DOCS_APPLY,
+        DOCS_MANUAL_CONTROL,
+        SET_MANUAL_CONTROL_SCHEMA,
+        VALIDATION_TUPLES,
+        apply_service_schema,
+    )
 
 
 def _format_voluptuous_instance(instance: vol.All) -> str: