fix(db): make sure PgSqlTools filter only accepts actual matches

The schema assets filter previously used preg_match(... ) !== false, which treats 0 (no match) as true and caused non-matching assets to be accepted. Use preg_match(... ) === 1 so the filter only accepts actual matches and avoids false positives.

Signed-off-by: Josh <josh.t.richards@gmail.com>

lib/private/DB/PgSqlTools.php

@@ -38,9 +38,9 @@ class PgSqlTools {
 			/** @var string|AbstractAsset $asset */
 			$filterExpression = '/^' . preg_quote($this->config->getSystemValueString('dbtableprefix', 'oc_')) . '/';
 			if ($asset instanceof AbstractAsset) {
-				return preg_match($filterExpression, $asset->getName()) !== false;
+				return preg_match($filterExpression, $asset->getName()) === 1;
 			}
-			return preg_match($filterExpression, $asset) !== false;
+			return preg_match($filterExpression, $asset) === 1;
 		});
 
 		foreach ($conn->createSchemaManager()->listSequences() as $sequence) {