feat(governance): surface stale km completion queue

apps/api/src/models/governance.py

@@ -417,6 +417,68 @@ class KnowledgeStaleOwnerReviewBurnDownResponse(BaseModel):
     generated_at: datetime
 
 
+class KnowledgeStaleOwnerReviewCompletionQueueItem(BaseModel):
+    dispatch_id: str
+    governance_event_id: str
+    entry_id: str
+    project_id: str
+    title: str
+    dispatch_status: str
+    workflow_stage: str
+    readiness: Literal["ready", "blocked", "completed", "failed"]
+    recommended_completion_outcome: Literal[
+        "refresh_with_evidence",
+        "archive",
+        "supersede",
+    ]
+    next_action: str
+    blockers: list[str] = Field(default_factory=list)
+    required_owner_fields: list[str] = Field(default_factory=list)
+    can_preview: bool
+    can_confirm_after_preview: bool
+    writes_km_on_confirm: bool
+    owner: str | None = None
+    owner_note: str | None = None
+    batch_governance_event_id: str | None = None
+    batch_dispatch_id: str | None = None
+    priority_tier: Literal["P0", "P1", "P2"]
+    priority_score: int
+    recommended_action: Literal[
+        "refresh_with_evidence",
+        "owner_review",
+        "archive_or_supersede",
+    ]
+    stale_days: int
+    view_count: int
+    correlation_sources: list[str] = Field(default_factory=list)
+    reasons: list[str] = Field(default_factory=list)
+    related_incident_id: str | None = None
+    related_playbook_id: str | None = None
+    related_approval_id: str | None = None
+    dry_run_plan_fingerprint: str | None = None
+    queued_at: datetime | None = None
+    started_at: datetime | None = None
+    completed_at: datetime | None = None
+
+
+class KnowledgeStaleOwnerReviewCompletionQueueResponse(BaseModel):
+    schema_version: str = "km_stale_owner_review_completion_queue_v1"
+    project_id: str
+    status_bucket: Literal["all", "ready", "blocked", "completed", "failed", "pending"]
+    total: int
+    returned: int
+    pending_count: int
+    ready_count: int
+    blocked_count: int
+    completed_count: int
+    failed_count: int
+    writes_on_read: bool = False
+    manual_review_required: bool = True
+    batch_writes_allowed: bool = False
+    items: list[KnowledgeStaleOwnerReviewCompletionQueueItem] = Field(default_factory=list)
+    generated_at: datetime
+
+
 class KnowledgeStaleOwnerReviewCompleteRequest(BaseModel):
     dispatch_id: str | None = Field(
         default=None,