Fix bug to compute usage metrics

[amrit110]

This pull request updates how workspace usage hours are calculated and displayed throughout the analytics service. Instead of measuring workspace lifetime from creation to now, the metrics now reflect the actual usage window, defined as the time between the first and last agent connections. This provides a more accurate representation of workspace activity for templates and teams.

Metrics calculation improvements:

• Added a new function calculateWorkspaceUsageHours in metrics.ts to compute usage hours based on the window from the first to the last agent connection, replacing the previous method that used workspace creation time to now.
• Updated the enrichWorkspaceData function in metrics.ts to use the new usage hours calculation for each workspace.

Documentation and interface updates:

• Updated comments and field descriptions in WorkspaceMetrics, TeamMetrics, and TemplateMetrics interfaces in types.ts to clarify that workspace hours are now based on usage (first to last connection) rather than lifetime. [1] [2] [3]

User interface improvements:

• Updated tooltips in templates-table.tsx and template-teams-content.tsx to clarify that "Total Hours" now reflects workspace usage hours (first to last connection) instead of lifetime hours. (services/analytics/app/components/templates-table.tsxL55-R55, services/analytics/app/template/[templateName]/template-teams-content.tsxL218-R218)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.09%. Comparing base (a0ddf68) to head (384173c).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #44   +/-   ##
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  Coverage   88.09%   88.09%           
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  Files           3        3           
  Lines         462      462           
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  Hits          407      407           
  Misses         55       55           

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