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.

_aup_reduce_budget.py

@@ -0,0 +1,18 @@
+from pathlib import Path
+p=Path(r'd:/Projects/Dev/ThreatHunt/backend/app/config.py')
+t=p.read_text(encoding='utf-8')
+old='''    SCANNER_MAX_ROWS_PER_SCAN: int = Field(
+        default=300000,
+        description="Global row budget for a single AUP scan request (0 = unlimited)",
+    )
+'''
+new='''    SCANNER_MAX_ROWS_PER_SCAN: int = Field(
+        default=120000,
+        description="Global row budget for a single AUP scan request (0 = unlimited)",
+    )
+'''
+if old not in t:
+    raise SystemExit('SCANNER_MAX_ROWS_PER_SCAN block not found')
+t=t.replace(old,new)
+p.write_text(t,encoding='utf-8')
+print('reduced SCANNER_MAX_ROWS_PER_SCAN default to 120000')