Implement FastAPI Temporal MVP pipeline

app/domain/enums.py

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+"""Domain enums shared across the application."""
+
+from enum import Enum
+
+
+class CustomerLevel(str, Enum):
+    """Supported customer tiers."""
+
+    LOW = "low"
+    MID = "mid"
+
+
+class ServiceMode(str, Enum):
+    """Supported service delivery modes."""
+
+    AUTO_BASIC = "auto_basic"
+    SEMI_PRO = "semi_pro"
+
+
+class OrderStatus(str, Enum):
+    """Lifecycle states for an order and workflow run."""
+
+    CREATED = "created"
+    RUNNING = "running"
+    WAITING_REVIEW = "waiting_review"
+    SUCCEEDED = "succeeded"
+    FAILED = "failed"
+    CANCELLED = "cancelled"
+
+
+class WorkflowStepName(str, Enum):
+    """Canonical workflow step names."""
+
+    PREPARE_MODEL = "prepare_model"
+    TRYON = "tryon"
+    SCENE = "scene"
+    TEXTURE = "texture"
+    FACE = "face"
+    FUSION = "fusion"
+    QC = "qc"
+    EXPORT = "export"
+    REVIEW = "review"
+
+
+class ReviewDecision(str, Enum):
+    """Supported review decisions for the mid-end workflow."""
+
+    APPROVE = "approve"
+    RERUN_SCENE = "rerun_scene"
+    RERUN_FACE = "rerun_face"
+    RERUN_FUSION = "rerun_fusion"
+    REJECT = "reject"
+
+
+class StepStatus(str, Enum):
+    """Execution status of a single workflow step record."""
+
+    PENDING = "pending"
+    RUNNING = "running"
+    WAITING = "waiting"
+    SUCCEEDED = "succeeded"
+    FAILED = "failed"
+
+
+class ReviewTaskStatus(str, Enum):
+    """Status of a human review task."""
+
+    PENDING = "pending"
+    SUBMITTED = "submitted"
+
+
+class AssetType(str, Enum):
+    """Asset classes produced by the pipeline."""
+
+    PREPARED_MODEL = "prepared_model"
+    TRYON = "tryon"
+    SCENE = "scene"
+    TEXTURE = "texture"
+    FACE = "face"
+    FUSION = "fusion"
+    QC_CANDIDATE = "qc_candidate"
+    FINAL = "final"
+