fix: return correct total when pagination goes beyond last page (CM-1220)

When a request page has no rows, COUNT(*) OVER() returns nothing and
total fell back to 0. Add a fallback COUNT query for this case so the
caller always receives the real matching-row count.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Umberto Sgueglia <usgueglia@contractor.linuxfoundation.org>

Author: ulemons

services/libs/data-access-layer/src/osspckgs/api.ts

@@ -103,6 +103,7 @@ export async function listPackagesForApi(
   else sortExpr = 'LOWER(p.name)'
   const sortDir = opts.sortDir === 'desc' ? 'DESC' : 'ASC'
 
+  const filterParams = { ...params }
   params.limit = opts.pageSize
   params.offset = (opts.page - 1) * opts.pageSize
 
@@ -129,7 +130,19 @@ export async function listPackagesForApi(
     params,
   )
 
-  const total = rows.length > 0 ? parseInt(rows[0].total, 10) : 0
+  let total: number
+  if (rows.length > 0) {
+    total = parseInt(rows[0].total, 10)
+  } else {
+    // Window function returns no rows when the page is beyond the result set.
+    // Fall back to a separate COUNT so the caller always gets the real total.
+    const countRow: { count: string } = await qx.selectOne(
+      `SELECT COUNT(*)::text AS count FROM packages p LEFT JOIN stewardships s ON s.package_id = p.id ${where}`,
+      filterParams,
+    )
+    total = parseInt(countRow.count, 10)
+  }
+
   return { rows, total }
 }