Chunk id lookups by \$this->maxQueryValues, not RELATION_QUERY_CHUNK_SIZE

CodeRabbit #3084994641 + #3084994657 follow-up: the earlier chunking
fix used self::RELATION_QUERY_CHUNK_SIZE (5000), which matches the
existing populateDocumentsRelationshipsBatch pattern but doesn't
respect the user-configurable validator ceiling.

Query::equal('\$id', \$chunk) is validated by DocumentsValidator
against \$this->maxQueryValues, not RELATION_QUERY_CHUNK_SIZE. A
caller doing \$db->setMaxQueryValues(100) followed by any of the
three chunked pre-reads would still throw QueryException because
chunks of 5000 exceed the configured 100.

Switch to array_chunk(..., max(1, \$this->maxQueryValues)) at all
three sites so chunk size always respects the actual validator
limit. In the default case (maxQueryValues = 5000) this produces
identical chunks to the old code; under customization it correctly
scales down.

Note: the 5 existing relationship-population chunking sites still
use RELATION_QUERY_CHUNK_SIZE and have the same latent bug under
customized maxQueryValues. Leaving that for a follow-up since
fixing the pattern globally is out of scope for this PR.

Author: premtsd-code

src/Database/Database.php

@@ -7159,7 +7159,7 @@ public function upsertDocumentsWithIncrease(
             }
             foreach ($idsByTenant as $tenant => $tenantIds) {
                 $tenantIds = \array_values(\array_unique($tenantIds));
-                foreach (\array_chunk($tenantIds, self::RELATION_QUERY_CHUNK_SIZE) as $chunk) {
+                foreach (\array_chunk($tenantIds, \max(1, $this->maxQueryValues)) as $chunk) {
                     $found = $this->authorization->skip(fn () => $this->withTenant($tenant, fn () => $this->silent(
                         fn () => $this->find($collection->getId(), [
                             Query::equal('$id', $chunk),
@@ -7178,7 +7178,7 @@ public function upsertDocumentsWithIncrease(
             )));
 
             if (!empty($docIds)) {
-                foreach (\array_chunk($docIds, self::RELATION_QUERY_CHUNK_SIZE) as $chunk) {
+                foreach (\array_chunk($docIds, \max(1, $this->maxQueryValues)) as $chunk) {
                     $existing = $this->authorization->skip(fn () => $this->silent(
                         fn () => $this->find($collection->getId(), [
                             Query::equal('$id', $chunk),

src/Database/Mirror.php

@@ -612,7 +612,7 @@ public function createDocuments(
             ));
 
             if (!empty($ids)) {
-                foreach (\array_chunk(\array_unique($ids), self::RELATION_QUERY_CHUNK_SIZE) as $chunk) {
+                foreach (\array_chunk(\array_unique($ids), \max(1, $this->maxQueryValues)) as $chunk) {
                     $existing = $this->source->silent(
                         fn () => $this->source->find($collection, [
                             Query::equal('$id', $chunk),