Initial commit: Agentic OS troubleshooting platform

Self-hosted, Docker-based agentic troubleshooting platform: FastAPI backend +
LangGraph agent, Next.js UI, tiered LLM routing (local Ollama -> Gemini ->
DeepSeek -> OpenRouter), MCP server manager, encrypted device credentials,
RBAC, audit log, project-memory + Obsidian integrations, and editable
troubleshooting decision rules tuned for the GeneseasX vessel stack.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/services/audit.py

@@ -0,0 +1,30 @@
+"""Audit logging helper."""
+from __future__ import annotations
+
+from typing import Any
+
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.audit import AuditLog
+from app.models.user import User
+
+
+async def record_audit(
+    db: AsyncSession,
+    actor: User | None,
+    action: str,
+    target_type: str | None = None,
+    target_id: int | None = None,
+    detail: dict[str, Any] | None = None,
+) -> None:
+    db.add(
+        AuditLog(
+            actor_id=actor.id if actor else None,
+            actor_email=actor.email if actor else None,
+            action=action,
+            target_type=target_type,
+            target_id=target_id,
+            detail=detail,
+        )
+    )
+    await db.commit()