Improve filter detection and ID generation based on code review

- Make filter detection in count() more robust by explicitly checking for UnifiedQuery properties
- Add DEFAULT_ID_LENGTH constant to make ID length configurable

Co-authored-by: xuyushun441-sys <255036401+xuyushun441-sys@users.noreply.github.com>

Author: Copilot

packages/drivers/sql/src/index.ts

@@ -15,6 +15,11 @@ import { Driver, IntrospectedSchema, IntrospectedTable, IntrospectedColumn, Intr
 import knex, { Knex } from 'knex';
 import { nanoid } from 'nanoid';
 
+/**
+ * Default ID length for auto-generated IDs
+ */
+const DEFAULT_ID_LENGTH = 16;
+
 /**
  * Command interface for executeCommand method
  */
@@ -274,7 +279,7 @@ export class SqlDriver implements Driver {
              toInsert.id = _id;
         } else if (toInsert.id === undefined) {
             // Auto-generate ID if not provided
-            toInsert.id = nanoid(16);
+            toInsert.id = nanoid(DEFAULT_ID_LENGTH);
         }
 
         // Knex insert returns Result array (e.g. ids)

packages/foundation/core/src/repository.ts

@@ -315,12 +315,19 @@ export class ObjectRepository {
 
     async count(filters: any): Promise<number> {
         // Normalize filters to UnifiedQuery format
-        // If filters is an array or Filter object, wrap it in a query object
+        // If filters is an array, wrap it in a query object
+        // If filters is already a UnifiedQuery (has UnifiedQuery-specific properties), use it as-is
         let query: UnifiedQuery;
-        if (Array.isArray(filters) || (filters && typeof filters === 'object' && !filters.fields && !filters.sort && !filters.limit)) {
+        if (Array.isArray(filters)) {
+            query = { filters };
+        } else if (filters && typeof filters === 'object' && (filters.fields || filters.sort || filters.limit !== undefined || filters.skip !== undefined)) {
+            // It's already a UnifiedQuery object
+            query = filters;
+        } else if (filters) {
+            // It's a raw filter object, wrap it
             query = { filters };
         } else {
-            query = filters || {};
+            query = {};
         }
 
         const hookCtx: RetrievalHookContext = {