feat: add video watch progress tracking with resume functionality

Implements a complete watch progress system that allows users to:
- Save playback position automatically every 5 seconds while watching
- Resume from last position when returning to a video
- Save progress on page leave using sendBeacon for reliability

Also includes:
- Optimized slug generation in projects and workspaces APIs (single query vs loop)
- Added isActive filter to version queries across all video endpoints
- Added pagination support for video and comment queries
- Enhanced database pool management with connection limits and graceful shutdown
- New WatchProgress Prisma model with user-version relations

app/api/projects/[projectId]/videos/route.ts

@@ -38,8 +38,14 @@ export async function GET(request: NextRequest, { params }: RouteParams) {
             orderBy: { position: 'asc' },
             include: {
                 versions: {
+                    where: { isActive: true },
                     orderBy: { versionNumber: 'desc' },
-                    include: {
+                    take: 1,
+                    select: {
+                        id: true,
+                        thumbnailUrl: true,
+                        duration: true,
+                        versionNumber: true,
                         _count: { select: { comments: true } },
                     },
                 },