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.

_edit_datasets.py

@@ -0,0 +1,39 @@
+from pathlib import Path
+p=Path(r'd:/Projects/Dev/ThreatHunt/backend/app/api/routes/datasets.py')
+t=p.read_text(encoding='utf-8')
+if 'from app.services.scanner import keyword_scan_cache' not in t:
+    t=t.replace('from app.services.host_inventory import inventory_cache','from app.services.host_inventory import inventory_cache\nfrom app.services.scanner import keyword_scan_cache')
+old='''@router.delete(
+    "/{dataset_id}",
+    summary="Delete a dataset",
+)
+async def delete_dataset(
+    dataset_id: str,
+    db: AsyncSession = Depends(get_db),
+):
+    repo = DatasetRepository(db)
+    deleted = await repo.delete_dataset(dataset_id)
+    if not deleted:
+        raise HTTPException(status_code=404, detail="Dataset not found")
+    return {"message": "Dataset deleted", "id": dataset_id}
+'''
+new='''@router.delete(
+    "/{dataset_id}",
+    summary="Delete a dataset",
+)
+async def delete_dataset(
+    dataset_id: str,
+    db: AsyncSession = Depends(get_db),
+):
+    repo = DatasetRepository(db)
+    deleted = await repo.delete_dataset(dataset_id)
+    if not deleted:
+        raise HTTPException(status_code=404, detail="Dataset not found")
+    keyword_scan_cache.invalidate_dataset(dataset_id)
+    return {"message": "Dataset deleted", "id": dataset_id}
+'''
+if old not in t:
+    raise SystemExit('delete block not found')
+t=t.replace(old,new)
+p.write_text(t,encoding='utf-8')
+print('updated datasets.py')