Function crawlCourse

crawlCourse(
    context: ExtensionContext,
    course: Course,
    termDir: string,
    progress: Progress<{ increment?: number; message?: string }>,
    token: CancellationToken,
): Promise<void>
Crawls one Blackboard course:
– Visits each sidebar page
– Saves its structure as JSON
– Downloads all attachments
Parameters
- context: ExtensionContext
  VS Code extension context (used for secret storage).
- course: Course
  Target course returned by CourseService.listCourses.
- termDir: string
  Absolute path to the local term folder.
- progress: Progress<{ increment?: number; message?: string }>
  VS Code progress reporter.
- token: CancellationToken
  Cancellation token (user-driven).
Returns Promise<void>
- Defined in src/backend/commands/crawlCourse.ts:28