Implement weak topic detection module

[Matee-ur-Rehman]

Overview

Implemented the Weak Topic Detection module for the AI/ML workspace.

What was added

• Quiz result data model
• JSON data loader
• Quiz result validation
• Topic-wise accuracy calculation
• Weak topic detection
• Minimum attempt rule
• Configurable weak-topic threshold
• Service layer
• API interface
• Sample quiz-result data
• Automated tests
• Project documentation
• Demo/testing commands

Detection Rules

• Minimum attempts: 3
• Weak-topic threshold: 60% accuracy

Testing

All Weak Topic Detection tests pass locally:

python -m pytest tests

Result:
1 passed

CI Note

The Chatbot CI check currently fails during the Python setup step because
the workflow references chatbot/requirements-dev.txt, which is not present
in the repository.

This occurs before the test step and is unrelated to the Weak Topic Detection
module.