Introduce a Total Call Minutes metric that automatically calculates and displays the sum of all call durations.

Key Details:
• Display total call minutes for selectable time ranges (e.g., daily, weekly, monthly, custom range).
• Include both inbound and outbound calls, with optional filters.
• Show the total in call logs, dashboards, or reports.
• Ensure real-time or near real-time updates.

Benefits:
• Saves time by eliminating manual calculations.
• Improves visibility into call usage and trends.
• Helps with reporting, billing, performance tracking, and usage limits.

Acceptance Criteria:
• Users can view total call minutes for a chosen date range.
• Totals update correctly when filters are applied.
• Data matches the sum of individual call records.
• Feature is accessible and easy to understand.