feat: Add Playbook Manager, Saved Searches, and Timeline View components

- Implemented PlaybookManager for creating and managing investigation playbooks with templates.
- Added SavedSearches component for managing bookmarked queries and recurring scans.
- Introduced TimelineView for visualizing forensic event timelines with zoomable charts.
- Enhanced backend processing with auto-queued jobs for dataset uploads and improved database concurrency.
- Updated frontend components for better user experience and performance optimizations.
- Documented changes in update log for future reference.

_patch_network_sleep.py

@@ -0,0 +1,14 @@
+from pathlib import Path
+
+p = Path(r"d:\Projects\Dev\ThreatHunt\frontend\src\components\NetworkMap.tsx")
+text = p.read_text(encoding="utf-8")
+
+anchor = "  useEffect(() => { canvasSizeRef.current = canvasSize; }, [canvasSize]);\n"
+insert = anchor + "\n  const sleep = (ms: number) => new Promise<void>(resolve => setTimeout(resolve, ms));\n"
+if "const sleep = (ms: number)" not in text and anchor in text:
+    text = text.replace(anchor, insert)
+
+text = text.replace("await new Promise(r => setTimeout(r, delayMs + jitter));", "await sleep(delayMs + jitter);")
+
+p.write_text(text, encoding="utf-8")
+print("Patched sleep helper + polling awaits")