Warning: This build has drifted.
The coverage report for this pull request build may be inaccurate because its base commit is no longer the HEAD of its target branch.
This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

    • Learn more: For more information on this, see Tracking coverage changes for pull request builds.
    • Fix now: For a quick fix, rebase this PR at GitHub. Your next report should be accurate.
    • Prevent going forward: To avoid this issue with future PRs, see these Recommended CI Configurations.

docs: Add bandwidth weighting design doc

Addresses design questions from review:
- Mixed fleet support (no instance type filtering)
- Conditional launch template generation per instance type
- Instance type discovery via DescribeInstanceTypes
- NodeClass-level configuration (not pod-level)
- Node labeling for observability and optional pod affinity
- Drift detection