feat: implement final approval gate workflow and checklist

apps/backend/src/domain/contracts/openapi.py

@@ -58,6 +58,11 @@ from .models import (
     ContentReviewIssueSummary,
     ContentReviewReportSummary,
     ContentReviewSuggestionSummary,
+    FinalApprovalChecklistItemSummary,
+    FinalApprovalChecklistResponse,
+    FinalApprovalPublishingSettings,
+    FinalApprovalRequest,
+    FinalApprovalResponse,
     EvidenceSummary,
     EvidenceCreateRequest,
     EvidenceMatrixResponse,
@@ -84,6 +89,8 @@ from .models import (
     ReviewSuggestionEditRequest,
     ReviewActionResponse,
     ReviewSummary,
+    FinalRevisionRequest,
+    FinalRevisionRequestResponse,
     SeoReviewReportResponse,
     SeoReviewRunResponse,
     RunnerFileRef,
@@ -167,6 +174,13 @@ CONTRACT_SCHEMA_MODELS: tuple[type[BaseModel], ...] = (
     ContentReviewIssueSummary,
     ContentReviewReportSummary,
     ContentReviewSuggestionSummary,
+    FinalApprovalChecklistItemSummary,
+    FinalApprovalChecklistResponse,
+    FinalApprovalPublishingSettings,
+    FinalApprovalRequest,
+    FinalApprovalResponse,
+    FinalRevisionRequest,
+    FinalRevisionRequestResponse,
     FinalReviewIssueSummary,
     FinalReviewIssuesResponse,
     LanguageReviewReportResponse,