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_wait.py

@@ -0,0 +1,37 @@
+from pathlib import Path
+import re
+
+p = Path(r"d:\Projects\Dev\ThreatHunt\frontend\src\components\NetworkMap.tsx")
+text = p.read_text(encoding="utf-8")
+pattern = re.compile(r"const waitUntilReady = async \(\): Promise<boolean> => \{[\s\S]*?\n\s*\};", re.M)
+replacement = '''const waitUntilReady = async (): Promise<boolean> => {
+      // Poll inventory-status with exponential backoff until 'ready' (or cancelled)
+      setProgress('Host inventory is being prepared in the background');
+      setLoading(true);
+      let delayMs = 1500;
+      const startedAt = Date.now();
+      for (;;) {
+        const jitter = Math.floor(Math.random() * 250);
+        await new Promise(r => setTimeout(r, delayMs + jitter));
+        if (cancelled) return false;
+        try {
+          const st = await network.inventoryStatus(selectedHuntId);
+          if (cancelled) return false;
+          if (st.status === 'ready') return true;
+          if (Date.now() - startedAt > 5 * 60 * 1000) {
+            setError('Host inventory build timed out. Please retry.');
+            return false;
+          }
+          delayMs = Math.min(10000, Math.floor(delayMs * 1.5));
+          // still building or none (job may not have started yet) - keep polling
+        } catch {
+          if (cancelled) return false;
+          delayMs = Math.min(10000, Math.floor(delayMs * 1.5));
+        }
+      }
+    };'''
+new_text, n = pattern.subn(replacement, text, count=1)
+if n != 1:
+    raise SystemExit(f"Failed to patch waitUntilReady, matches={n}")
+p.write_text(new_text, encoding="utf-8")
+print("Patched waitUntilReady")