src/types/api/v1.ts is dead code -- unused types

[DeFiVC]

Problem

The file src/types/api/v1.ts defines ApiResponse<T>, PaginatedResponse<T>, CourseSummaryV1, etc., but none of these types are imported or used anywhere in the codebase. The actual controllers use inline object literals.

Fix

Delete the file or move types to where they're used:

rm src/types/api/v1.ts

Or if types are needed, import them in controllers.

Scope

• Delete src/types/api/v1.ts

Acceptance Criteria

1. File is removed or types are used
2. No TypeScript errors
3. Existing tests pass

Technical Context

• src/types/api/v1.ts -- unused types