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.

.gitignore

@@ -1,4 +1,4 @@
-# ── Python ────────────────────────────────────
+# ── Python ────────────────────────────────────
 __pycache__/
 *.py[cod]
 *$py.class
@@ -8,34 +8,34 @@ build/
 *.egg
 .eggs/
 
-# ── Virtual environments ─────────────────────
+# ── Virtual environments ─────────────────────
 venv/
 .venv/
 env/
 
-# ── IDE / Editor ─────────────────────────────
+# ── IDE / Editor ─────────────────────────────
 .vscode/
 .idea/
 *.swp
 *.swo
 *~
 
-# ── OS ────────────────────────────────────────
+# ── OS ────────────────────────────────────────
 .DS_Store
 Thumbs.db
 
-# ── Environment / Secrets ────────────────────
+# ── Environment / Secrets ────────────────────
 .env
 *.env.local
 
-# ── Database ─────────────────────────────────
+# ── Database ─────────────────────────────────
 *.db
 *.sqlite3
 
-# ── Uploads ──────────────────────────────────
+# ── Uploads ──────────────────────────────────
 uploads/
 
-# ── Node / Frontend ──────────────────────────
+# ── Node / Frontend ──────────────────────────
 node_modules/
 frontend/build/
 frontend/.env.local
@@ -43,14 +43,18 @@ npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
 
-# ── Docker ───────────────────────────────────
+# ── Docker ───────────────────────────────────
 docker-compose.override.yml
 
-# ── Test / Coverage ──────────────────────────
+# ── Test / Coverage ──────────────────────────
 .coverage
 htmlcov/
 .pytest_cache/
 .mypy_cache/
 
-# ── Alembic ──────────────────────────────────
+# ── Alembic ──────────────────────────────────
 alembic/versions/*.pyc
+
+*.db-wal
+*.db-shm
+