BLDX-689 | fix: add DbtTest under TYPE_CHECKING in SQL to satisfy ruff/mypy

The SQL → DbtTest circular import skip removed the bottom import of DbtTest
from s_q_l.py, leaving DbtTest undefined for type annotations. Added SQL to
_ASSETS_REQUIRE_TYPE_CHECKING and a TYPE_CHECKING guard in module.jinja2 to
import DbtTest at type-check time only, matching the DataQualityRule → Column
pattern.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Aryamanz29

pyatlan/generator/class_generator.py

@@ -232,6 +232,7 @@ class AssetInfo:
         "Purpose",
         "DataQualityRule",
         "Process",
+        "SQL",
     }
     _ASSETS_REQUIRE_ASYNC_CLIENT = {
         "Badge",

pyatlan/generator/templates/module.jinja2

@@ -49,6 +49,9 @@ if TYPE_CHECKING:
     {% if asset_info.name == 'DbtProcess' %}
     from pyatlan.model.assets import Procedure, BigqueryRoutine, FabricActivity, Function
     {% endif %}
+    {% if asset_info.name == 'SQL' %}
+    from pyatlan.model.assets.core.dbt_test import DbtTest
+    {% endif %}
     {% if asset_info.name in asset_info._ASSETS_REQUIRE_ASYNC_CLIENT %}
     from pyatlan.client.aio.client import AsyncAtlanClient
     from pyatlan.model.aio import AsyncCustomMetadataProxy

pyatlan/model/assets/core/s_q_l.py

@@ -5,7 +5,7 @@
 from __future__ import annotations
 
 from datetime import datetime
-from typing import ClassVar, Dict, List, Optional
+from typing import TYPE_CHECKING, ClassVar, Dict, List, Optional
 
 from pydantic.v1 import Field, validator
 
@@ -19,6 +19,9 @@
 
 from .catalog import Catalog
 
+if TYPE_CHECKING:
+    from pyatlan.model.assets.core.dbt_test import DbtTest
+
 
 class SQL(Catalog):
     """Description"""