feat(playbook): version generated playbooks

apps/api/src/models/playbook.py

@@ -197,6 +197,10 @@ class Playbook(BaseModel):
         default_factory=list,
         description="萃取來源的 Incident ID",
     )
+    version: int = Field(default=1, ge=1, description="Playbook lineage version")
+    parent_playbook_id: str | None = Field(None, description="Root Playbook ID for this lineage")
+    supersedes_playbook_id: str | None = Field(None, description="Previous Playbook version superseded by this one")
+    version_reason: str | None = Field(None, description="Why this version was created")
     ai_confidence: float = Field(
         default=0.0,
         ge=0.0,
@@ -234,6 +238,10 @@ class Playbook(BaseModel):
         default=False,
         description="執行前是否需要 Pre-flight 備份檢查",
     )
+    review_required: bool = Field(
+        default=False,
+        description="KM/治理累積觸發人工或 AI 複審信號",
+    )
 
     # === 時間軸 ===
     created_at: datetime = Field(default_factory=now_taipei)