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.

alembic/versions/20251111_01_add_performance_metrics_table.py

@@ -0,0 +1,38 @@
+"""Add performance_metrics table"""
+
+from __future__ import annotations
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "20251111_01"
+down_revision = "20251111_00"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "performance_metrics",
+        sa.Column("id", sa.Integer(), nullable=False),
+        sa.Column("timestamp", sa.DateTime(), nullable=True),
+        sa.Column("metric_name", sa.String(), nullable=True),
+        sa.Column("value", sa.Float(), nullable=True),
+        sa.Column("labels", sa.String(), nullable=True),
+        sa.Column("endpoint", sa.String(), nullable=True),
+        sa.Column("method", sa.String(), nullable=True),
+        sa.Column("status_code", sa.Integer(), nullable=True),
+        sa.Column("duration_seconds", sa.Float(), nullable=True),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index(op.f("ix_performance_metrics_timestamp"), "performance_metrics", ["timestamp"], unique=False)
+    op.create_index(op.f("ix_performance_metrics_metric_name"), "performance_metrics", ["metric_name"], unique=False)
+    op.create_index(op.f("ix_performance_metrics_endpoint"), "performance_metrics", ["endpoint"], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_index(op.f("ix_performance_metrics_endpoint"), table_name="performance_metrics")
+    op.drop_index(op.f("ix_performance_metrics_metric_name"), table_name="performance_metrics")
+    op.drop_index(op.f("ix_performance_metrics_timestamp"), table_name="performance_metrics")
+    op.drop_table("performance_metrics")