Create a method that performs bulk update operations on Account Industry field.

Parameters:

• accountIds (List<Id>): List of Account IDs to update
• newIndustry (String): The new industry value

Returns:

• Integer: The number of accounts successfully updated, or 0 if none

Requirements:

• Use DML bulk update operation
• Handle null or empty accountIds list by returning 0
• Query accounts by IDs before updating
• Handle DML exceptions gracefully
• Return the count of successfully updated records

Example:

List<Id> accountIds = new List<Id>{accountId1, accountId2};
Integer updated = bulkUpdateAccountIndustry(accountIds, 'Technology');
// Returns: 2