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.

_perf_edit_networkmap_render.py

@@ -0,0 +1,39 @@
+from pathlib import Path
+p=Path(r'd:/Projects/Dev/ThreatHunt/frontend/src/components/NetworkMap.tsx')
+t=p.read_text(encoding='utf-8')
+repls={
+"const LARGE_HUNT_SUBGRAPH_HOSTS = 350;":"const LARGE_HUNT_SUBGRAPH_HOSTS = 220;",
+"const LARGE_HUNT_SUBGRAPH_EDGES = 2500;":"const LARGE_HUNT_SUBGRAPH_EDGES = 1200;",
+"const RENDER_SIMPLIFY_NODE_THRESHOLD = 220;":"const RENDER_SIMPLIFY_NODE_THRESHOLD = 120;",
+"const RENDER_SIMPLIFY_EDGE_THRESHOLD = 1200;":"const RENDER_SIMPLIFY_EDGE_THRESHOLD = 500;",
+"const EDGE_DRAW_TARGET = 1000;":"const EDGE_DRAW_TARGET = 600;"
+}
+for a,b in repls.items():
+    if a not in t:
+        raise SystemExit(f'missing constant: {a}')
+    t=t.replace(a,b)
+
+old='''  // Then label hit (so clicking text works too)
+  for (const n of graph.nodes) {
+    if (isPointOnNodeLabel(n, wx, wy, vp)) return n;
+  }
+'''
+new='''  // Then label hit (so clicking text works too on manageable graph sizes)
+  if (graph.nodes.length <= 220) {
+    for (const n of graph.nodes) {
+      if (isPointOnNodeLabel(n, wx, wy, vp)) return n;
+    }
+  }
+'''
+if old not in t:
+    raise SystemExit('label hit block not found')
+t=t.replace(old,new)
+
+old2='simulate(g, w / 2, h / 2, 60);'
+if t.count(old2) < 2:
+    raise SystemExit('expected two simulate calls')
+t=t.replace(old2,'simulate(g, w / 2, h / 2, 20);',1)
+t=t.replace(old2,'simulate(g, w / 2, h / 2, 30);',1)
+
+p.write_text(t,encoding='utf-8')
+print('tightened network map rendering + load limits')