feat: workspace analytics, daily collection, and post backfill

[paulocastellano]

Summary

• Persist workspace-level follower snapshots and post metrics through scheduled jobs with retries and account-scoped history.
• Import native publication history for supported networks, preserve it across reconnects, and distinguish TryPost-published from external posts.
• Add the analytics dashboard and publication details with follower and post charts, summary, top posts, performance, and compact metric formatting.
• Keep LinkedIn and unsupported channels out of analytics v1; document future scope.

Validation

• php artisan test --compact tests/Feature/Analytics tests/Browser/WorkspaceAnalyticsTest.php tests/Browser/PublicationAnalyticsTest.php — 155 passed (693 assertions).
• npx vue-tsc --noEmit and npm run build passed in earlier implementation turns.