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/tests/test_task_runtime.py

@@ -0,0 +1,28 @@
+"""Tests for per-task runtime flags."""
+from app.services.task_runtime import (
+    CANCELLABLE_STATUSES,
+    TaskCancelledError,
+    apply_min_tier_floor,
+)
+
+
+def test_cancellable_statuses():
+    assert "running" in CANCELLABLE_STATUSES
+    assert "queued" in CANCELLABLE_STATUSES
+    assert "succeeded" not in CANCELLABLE_STATUSES
+
+
+def test_task_cancelled_error_message():
+    err = TaskCancelledError("Task cancelled by user")
+    assert "cancelled" in str(err).lower()
+
+
+def test_apply_min_tier_floor_skips_local():
+    assert apply_min_tier_floor(["local", "economy", "premium"], "economy") == [
+        "economy",
+        "premium",
+    ]
+
+
+def test_apply_min_tier_floor_premium():
+    assert apply_min_tier_floor(["local", "economy"], "premium") == ["premium"]