fix(cli): update analytics help text

[upsetbit]

Summary

Fixes #296.

Updates prosa analytics --help so it matches the implemented reports and heatmap flag behavior.

What changed

• Added the profiles report to the analytics help text.
• Changed the heatmap note from ignores to rejects for --last, --since, and --between.
• Added a help-output test for the listed report and heatmap rule.

Validation

• go test ./internal/cli -run 'TestAnalyticsHelpListsProfilesAndHeatmapWindowRule|TestValidAnalyticsReportsIncludesNewReports' -count=1
• go test ./internal/cli/... -race
• go build -o ./bin/prosa ./cmd/prosa
• Manual check for prosa analytics --help