feat/template-coursemap-api-updated

[Duy-Nguyen1104]

Description

Added a fallback mechanism for course maps, allowing users without personal course maps to see a template/default course map. When a user requests their course map but doesn't have one configured, the system will automatically return the template course map (defined with userId=null)
Fixes # (issue)

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Tests have been added that cover the following scenarios:

1. Template fallback: When a user without a course map requests their course map, they receive the template course map
2. Personal map priority: When a user with their own course map makes a request, their personal map is returned (not the template)
3. Course map unit structure: Template course maps contain the correct number of units in each year and teaching period
4. Course map unit details: Units in template course maps have the correct data (unitId, yearSlot, teachingPeriodSlot, and unitSlot)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have created or extended unit tests to address my new additions
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules