Validated in a combined 10-PR batch worktree off release/v3.8.51 tip. Fixes#11523.
- Focused test: tests/unit/build/docker-next-channel-8576.test.ts — 7/7 pass
- typecheck:core, file-size, changelog-integrity, complexity, cognitive-complexity gates — all OK
- Full-repo lint: 503 pre-existing problems confirmed identical on the pure release/v3.8.51 tip — unrelated to this diff
⚠️ base-red inherited: #11449
Thanks for treating Docker publishes from non-default frozen release branches as an expected no-op.