feat: add BaseLazyFetchSchema for pagination and projection support in list requests

app/core/schemas.py

@@ -2,7 +2,7 @@
 Core/Common Pydantic schemas used across multiple modules.
 These schemas provide reusable components for consistent API responses.
 """
-from typing import Optional, Any, Dict
+from typing import Optional, Any, Dict, List
 from datetime import datetime
 from pydantic import BaseModel, Field
 
@@ -118,3 +118,25 @@ class StatusResponse(BaseModel):
                 }
             }
         }
+
+
+class BaseLazyFetchSchema(BaseModel):
+    """
+    Base schema for lazy-fetch list requests with pagination and projection support.
+    Provides common fields for listing endpoints with filtering, pagination, and field projection.
+    """
+    skip: int = Field(0, ge=0, description="Number of records to skip (pagination offset)")
+    limit: int = Field(100, ge=1, le=500, description="Maximum number of records to return")
+    projection_list: Optional[List[str]] = Field(
+        None, 
+        description="List of fields to include in response (omit for all fields)"
+    )
+    
+    class Config:
+        json_schema_extra = {
+            "example": {
+                "skip": 0,
+                "limit": 100,
+                "projection_list": ["id", "name", "status"]
+            }
+        }