Implement FastAPI Temporal MVP pipeline

app/workers/activities/texture_activities.py

@@ -0,0 +1,15 @@
+"""Texture mock activity."""
+
+from temporalio import activity
+
+from app.domain.enums import AssetType
+from app.workers.activities.tryon_activities import execute_asset_step
+from app.workers.workflows.types import MockActivityResult, StepActivityInput
+
+
+@activity.defn
+async def run_texture_activity(payload: StepActivityInput) -> MockActivityResult:
+    """Mock garment texture enhancement."""
+
+    return await execute_asset_step(payload, AssetType.TEXTURE)
+