fix: address code review feedback

- Fix GetRaw() error handling to check status before reading body
- Add context.Context support to all HTTP requests
- Use consistent capitalized error messages
- Update copyright year from 2024 to 2025
- Add unit tests for modules/api/client.go
- Add tests for runs, jobs, logs commands

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

modules/api/types.go

@@ -1,4 +1,4 @@
-// Copyright 2024 The Gitea Authors. All rights reserved.
+// Copyright 2025 The Gitea Authors. All rights reserved.
 // SPDX-License-Identifier: MIT
 
 package api