Create academic grade

Create a single academic grade configuration. Use Cases:

• Add a new grade to existing grading system
• Create individual grade after initial setup
• Define custom grade with specific mark ranges Request Structure: The request body should contain:
• grade: Grade letter/symbol (e.g., “A”, “B”, “C”, “1”, “2”, etc.) - Required
• level: Academic level - either “O Level” or “A Level” - Required
• min_mark: Minimum mark for this grade (0-100) - Required
• max_mark: Maximum mark for this grade (0-100) - Required
• remarks: Optional description or remarks for the grade Validation Rules:
• min_mark must be less than max_mark
• Mark ranges must not overlap with existing grades for the same level
• Grade value must be unique within the same level
• Marks must be between 0 and 100 Important Notes:
• For bulk creation of multiple grades, use the /bulk-create endpoint instead
• Each level (O-Level/A-Level) should have complete grade coverage from 0 to 100
• Grade names are case-sensitive