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/core/logging.py

@@ -0,0 +1,44 @@
+"""Structured logging setup with structlog."""
+
+import logging
+import sys
+
+import structlog
+
+from app.core.config import get_settings
+
+settings = get_settings()
+
+
+def setup_logging() -> None:
+    level = getattr(logging, settings.log_level.upper(), logging.INFO)
+
+    logging.basicConfig(
+        format="%(message)s",
+        stream=sys.stdout,
+        level=level,
+    )
+
+    processors: list = [
+        structlog.contextvars.merge_contextvars,
+        structlog.processors.add_log_level,
+        structlog.processors.TimeStamper(fmt="iso", utc=True),
+        structlog.processors.StackInfoRenderer(),
+        structlog.processors.format_exc_info,
+    ]
+
+    if settings.log_format == "json":
+        processors.append(structlog.processors.JSONRenderer())
+    else:
+        processors.append(structlog.dev.ConsoleRenderer())
+
+    structlog.configure(
+        processors=processors,
+        wrapper_class=structlog.make_filtering_bound_logger(level),
+        logger_factory=structlog.PrintLoggerFactory(),
+        cache_logger_on_first_use=True,
+    )
+
+
+def get_logger(name: str) -> structlog.stdlib.BoundLogger:
+    return structlog.get_logger(name)  # type: ignore[no-any-return]