SQLite support in getStats() function

app/Filament/Company/Resources/Purchases/BillResource/Widgets/BillOverview.php

 
             if ($driver === 'pgsql') {
                 $query->selectRaw('AVG(EXTRACT(EPOCH FROM (paid_at - date)) / 86400) as avg_days');
+            } elseif ($driver === 'sqlite') {
+                $query->selectRaw('AVG(julianday(paid_at) - julianday(date)) as avg_days');
             } else {
                 $query->selectRaw('AVG(TIMESTAMPDIFF(DAY, date, paid_at)) as avg_days');
             }

app/Filament/Company/Resources/Purchases/VendorResource/Widgets/BillOverview.php

 
         if ($driver === 'pgsql') {
             $query->selectRaw('AVG(EXTRACT(EPOCH FROM (paid_at - date)) / 86400) as avg_days');
+        } elseif ($driver === 'sqlite') {
+            $query->selectRaw('AVG(julianday(paid_at) - julianday(date)) as avg_days');
         } else {
             $query->selectRaw('AVG(TIMESTAMPDIFF(DAY, date, paid_at)) as avg_days');
         }

app/Filament/Company/Resources/Sales/ClientResource/Widgets/InvoiceOverview.php

 
         if ($driver === 'pgsql') {
             $query->selectRaw('AVG(EXTRACT(EPOCH FROM (paid_at - date)) / 86400) as avg_days');
+        } elseif ($driver === 'sqlite') {
+            $query->selectRaw('AVG(julianday(paid_at) - julianday(date)) as avg_days');
         } else {
             $query->selectRaw('AVG(TIMESTAMPDIFF(DAY, date, paid_at)) as avg_days');
         }

app/Filament/Company/Resources/Sales/InvoiceResource/Widgets/InvoiceOverview.php

 
             if ($driver === 'pgsql') {
                 $query->selectRaw('AVG(EXTRACT(EPOCH FROM (paid_at - approved_at)) / 86400) as avg_days');
+            } elseif ($driver === 'sqlite') {
+                $query->selectRaw('AVG(julianday(paid_at) - julianday(approved_at)) as avg_days');
             } else {
                 $query->selectRaw('AVG(TIMESTAMPDIFF(DAY, approved_at, paid_at)) as avg_days');
             }