Initial scaffold: FastAPI backend + Vue 3 frontend + Docker setup

Backend: config/db/security/logging core, SQLAlchemy models (Server,
Credential, UpdateJob, UpdateLog, AuditLog, User), services (winrm, ssh,
cau, audit, job_runner), REST API (auth, servers, updates, audit),
Socket.io WebSocket layer.
Frontend: Vue 3 + TS + Pinia + Tailwind, Views (Dashboard, Servers,
Updates, Audit, Login), axios + socket.io-client, nginx prod config.

backend/app/schemas/audit.py

@@ -0,0 +1,25 @@
+"""Audit log schemas."""
+
+from datetime import datetime
+
+from pydantic import BaseModel, ConfigDict
+
+
+class AuditLogRead(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    id: int
+    timestamp: datetime
+    username: str
+    action: str
+    target: str | None
+    result: str
+    details: str | None
+    ip_address: str | None
+
+
+class AuditLogPage(BaseModel):
+    items: list[AuditLogRead]
+    total: int
+    page: int
+    page_size: int