feat(monitoring): generate daily tasks and optimize heartbeat writes

Adds a MonitoringDailyTaskWorker that materializes and dispatches
daily collect tasks from active subscription/desktop-client state,
with per-run atomic metrics and a Prometheus collector. Dashboard
and question-detail APIs now surface a platform_authorization_status
so the UI can distinguish no-desktop-client, no-authorized-platforms,
and authorized states; quota/access-state lookups resolve by request
workspace instead of tenant.

Hardens heartbeat: a desktop_client_primary_leases table gives
per-(tenant, workspace) sticky primary selection, read-mostly lease
resolution avoids a per-heartbeat transaction, and unchanged platform
access reports skip snapshot upserts outside a 10-minute refresh
window. Adds heartbeat primary/snapshot metrics exposed via
token-protected tenant-api /api/internal/metrics endpoints plus
Prometheus. Monitoring quota seed is removed from dev-seed since
daily plans now derive from desktop bindings, and the projection
uses the canonical six-platform catalog so platforms with zero
samples still render.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

server/internal/tenant/app/monitoring_phase2_desktop_tasks.go

@@ -223,8 +223,7 @@ func (s *MonitoringService) loadMonitorDesktopAccountMap(
 	rows, err := s.businessPool.Query(ctx, `
 		SELECT DISTINCT ON (platform_id)
 			platform_id,
-			desktop_id,
-			health
+			desktop_id
 		FROM platform_accounts
 		WHERE tenant_id = $1
 		  AND workspace_id = $2
@@ -251,14 +250,10 @@ func (s *MonitoringService) loadMonitorDesktopAccountMap(
 		var (
 			platformID string
 			desktopID  uuid.UUID
-			health     string
 		)
-		if scanErr := rows.Scan(&platformID, &desktopID, &health); scanErr != nil {
+		if scanErr := rows.Scan(&platformID, &desktopID); scanErr != nil {
 			return nil, response.ErrInternal(50117, "desktop_account_lookup_failed", "failed to parse monitor desktop accounts")
 		}
-		if strings.TrimSpace(health) != "live" {
-			continue
-		}
 		result[platformID] = desktopID
 	}
 	if err := rows.Err(); err != nil {