This commit fixes several issues with the new ReadableStream.Ref system
that caused body-stream tests to hang:
1. **Body.zig:1020** - Fixed owner mismatch when setting stream after draining
- Was using `.strong` owner when should use actual owner (Request/Response)
- This caused Ref.get() to fail since Ref type didn't match owner type
2. **Body.zig:964,1026** - Set proper Ref type for cloned bodies
- When tee() returns streams via array, cloned body gets proper Ref type
- Ensures cloned body can access its stream via GC cache
3. **Request.zig:819** - Fixed stream assignment in doClone
- Stream[0] should go to original request, not cloned request
4. **ReadableStream.zig:108** - Always update original Ref after tee()
- Original body's Ref must point to its tee'd stream
5. **body-stream.test.ts** - Fixed test discovery hang
- Changed from eager to lazy array creation using factory function
- Prevents creating hundreds of 2MB arrays during test discovery
- Arrays now created on-demand when each test runs
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
699d8474df
