Bulk create academic grades

Create multiple academic grade configurations at once for both O-Level and A-Level. Use Cases:

• Initial system setup: Configure all grading scales in one request
• Academic year setup: Define grade boundaries for the new academic year
• Grading system updates: Replace entire grading configuration
• Multi-level configuration: Set up both O-Level and A-Level grades simultaneously Request Structure: The request body should contain two arrays: o_level and a_level. Each array contains grade objects with:
• grade: Grade letter/symbol (e.g., “A”, “B”, “C”, “D”, “F”)
• min_mark: Minimum mark for this grade (0-100)
• max_mark: Maximum mark for this grade (0-100)
• remarks: Optional description/remarks for the grade Validation Rules:
• At least one array (o_level or a_level) must be provided
• Both o_level and a_level must be arrays if provided
• Each grade object must be a valid dictionary
• The level field is automatically added based on the array (“O Level” or “A Level”)
• All standard AcademicSettings validations apply (min_mark < max_mark, no overlaps, etc.) Important Notes:
• This endpoint creates new records; it does NOT update existing grades
• Each grade configuration must have unique mark ranges within its level
• Non-dictionary items in arrays are filtered out automatically
• The endpoint uses the standard AcademicSettingsSerializer validation
• Transaction is atomic - if any grade fails validation, none are created