fix: Cast both sides of comparison and fix flaky timing test

Cast both $value and $oldValue by attribute type before comparison to
handle adapters like MongoDB that don't cast floats on read.
Add usleep before doc4 update to prevent same-millisecond timestamps.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: abnegate

src/Database/Database.php

@@ -5704,16 +5704,25 @@ public function updateDocument(string $collection, string $id, Document $documen
 
                     $oldValue = $old->getAttribute($key);
 
-                    // Cast value to attribute type for consistent comparison
-                    // (e.g. cache JSON round-trip turns float 1.0 into int 1)
+                    // Cast both values to attribute type for consistent comparison
+                    // (e.g. cache JSON round-trip turns float 1.0 into int 1,
+                    //  and some adapters may not cast floats on read)
                     $attrType = $attributeTypes[$key] ?? null;
-                    if ($attrType !== null && !\is_null($value) && !($value instanceof Operator)) {
-                        $value = match ($attrType) {
-                            self::VAR_FLOAT => (float)$value,
-                            self::VAR_INTEGER => (int)$value,
-                            self::VAR_BOOLEAN => (bool)$value,
-                            default => $value,
+                    if ($attrType !== null && !($value instanceof Operator)) {
+                        $castFn = match ($attrType) {
+                            self::VAR_FLOAT => fn($v) => (float)$v,
+                            self::VAR_INTEGER => fn($v) => (int)$v,
+                            self::VAR_BOOLEAN => fn($v) => (bool)$v,
+                            default => null,
                         };
+                        if ($castFn !== null) {
+                            if (!\is_null($value)) {
+                                $value = $castFn($value);
+                            }
+                            if (!\is_null($oldValue)) {
+                                $oldValue = $castFn($oldValue);
+                            }
+                        }
                     }
 
                     // If values are not equal we need to update document.

tests/e2e/Adapter/Scopes/DocumentTests.php

@@ -5834,6 +5834,7 @@ public function testSingleDocumentDateOperations(): void
 
         $doc4->setAttribute('$updatedAt', null);
         $doc4->setAttribute('$createdAt', null);
+        \usleep(2000); // Ensure updatedAt timestamp differs from creation time
         $updatedDoc4 = $database->updateDocument($collection, 'doc4', document: $doc4);
 
         $this->assertEquals($originalCreatedAt4, $updatedDoc4->getAttribute('$createdAt'));