Add Course entity and related migrations

[JoeProgrammer88]

Closes #5

This pull request introduces a new Course entity to the application and updates the database schema to support it. The changes include adding the Course model to the Entity Framework context, creating the necessary database tables via migrations, and enforcing a maximum length constraint on the course description field.

Entity and Database Schema Additions:

• Added a DbSet<Course> property to the ApplicationDbContext class, enabling Entity Framework to track and manage Course entities.
• Created an initial migration (20251010012840_AddedCourse) that adds the Courses table to the database, including columns for Id, Title, CourseCode, and Description. [1] [2]

Schema Constraint Update:

• Added a follow-up migration (20251010013013_CourseDescriptionLength) to enforce a maximum length of 300 characters on the Description column in the Courses table.

[Copilot]

Pull Request Overview

This PR introduces a new Course entity to support course management functionality in the application. The changes add the Course model with proper validation constraints, create the necessary database tables through Entity Framework migrations, and integrate the entity into the application's data context.

• Added a Course entity with proper data annotations for validation and constraints
• Created two database migrations to establish the Courses table and enforce description length limits
• Updated the ApplicationDbContext to include the Course entity and modernized namespace syntax

Reviewed Changes

Copilot reviewed 5 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
SpeakingInBitsWeb/Models/Course.cs	Defines the Course entity with validation attributes and documentation
SpeakingInBitsWeb/Data/ApplicationDbContext.cs	Adds Course DbSet and updates namespace to file-scoped
SpeakingInBitsWeb/Data/Migrations/20251010012840_AddedCourse.cs	Initial migration creating the Courses table
SpeakingInBitsWeb/Data/Migrations/20251010013013_CourseDescriptionLength.cs	Follow-up migration adding 300-character limit to Description column
SpeakingInBitsWeb/Data/Migrations/ApplicationDbContextModelSnapshot.cs	Updated model snapshot reflecting the Course entity configuration

Files not reviewed (2)

• SpeakingInBitsWeb/Data/Migrations/20251010012840_AddedCourse.Designer.cs: Language not supported
• SpeakingInBitsWeb/Data/Migrations/20251010013013_CourseDescriptionLength.Designer.cs: Language not supported

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