Fix bug to track active hours across templates

[amrit110]

This pull request introduces improvements to how active hours are calculated and displayed per team for each template in the analytics system. The changes ensure that active hours are accurately attributed to the correct template and team, avoiding the inclusion of historical activity from other templates. The frontend and backend are updated to support and display these refined metrics.

Backend metrics calculation improvements:

• In coder/analytics/collect.py, when initializing new usage records, total_active_hours now starts at 0.0 to prevent inheriting cross-template hours, ensuring only incremental activity is counted for each template.
• In coder/analytics/aggregate.py, per-team active hours specific to each template are now calculated and included in the metrics output as a new team_active_hours field. [1] [2]

Frontend and types update:

• In services/analytics/lib/types.ts, the TemplateMetrics interface is updated to include the new team_active_hours field, enabling type-safe usage throughout the frontend.
• In services/analytics/app/template/[templateName]/template-teams-content.tsx, the display of active hours per team is updated to use the new per-template, per-team team_active_hours metric, defaulting to 0 if not present. (services/analytics/app/template/[templateName]/template-teams-content.tsxL389-R389)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.62%. Comparing base (715b2f8) to head (0929a5f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #72   +/-   ##
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  Coverage   90.62%   90.62%           
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  Files          10       10           
  Lines        1408     1408           
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  Hits         1276     1276           
  Misses        132      132           

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