feat: Enhance project and scenario creation with monitoring metrics

- Added monitoring metrics for project creation success and error handling in `ProjectRepository`.
- Implemented similar monitoring for scenario creation in `ScenarioRepository`.
- Refactored `run_monte_carlo` function in `simulation.py` to include timing and success/error metrics.
- Introduced new CSS styles for headers, alerts, and navigation buttons in `main.css` and `projects.css`.
- Created a new JavaScript file for navigation logic to handle chevron buttons.
- Updated HTML templates to include new navigation buttons and improved styling for buttons.
- Added tests for reporting service and routes to ensure proper functionality and access control.
- Removed unused imports and optimized existing test files for better clarity and performance.

pyproject.toml

@@ -18,6 +18,9 @@ exclude = '''
 pythonpath = ["."]
 testpaths = ["tests"]
 addopts = "-ra --strict-config --strict-markers --cov=. --cov-report=term-missing --cov-report=xml --cov-fail-under=80"
+markers = [
+    "asyncio: marks tests as async (using pytest-asyncio)",
+]
 
 [tool.coverage.run]
 branch = true
@@ -35,3 +38,7 @@ omit = [
 skip_empty = true
 show_missing = true
 
+[tool.bandit]
+exclude_dirs = ["tests", "alembic", "scripts"]
+skips = ["B101", "B601"]  # B101: assert_used, B601: shell_injection (may be false positives)
+