chore: services export + meetings 文檔格式化

- services/__init__.py: 導出 IncidentApprovalService (ADR-027)
- meetings docs: 格式化更新

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/api/src/services/__init__.py

@@ -52,6 +52,11 @@ from .model_registry import (
     get_model_registry,
     reset_model_registry,
 )
+# ADR-027: Incident-Approval 同步架構 (2026-03-26)
+from .incident_approval_service import (
+    IncidentApprovalService,
+    IncidentApprovalSyncError,
+)
 from .trust_engine import (
     RiskAdjustment,
     RiskLevel,
@@ -114,4 +119,7 @@ __all__ = [
     "get_model",
     "get_model_by_complexity",
     "reset_model_registry",
+    # Incident-Approval Sync (ADR-027)
+    "IncidentApprovalService",
+    "IncidentApprovalSyncError",
 ]