- Add .gitignore (build artifacts, editor swapfiles, envtest testbin).
- Remove the stray .DESIGN.md.swp that was sitting untracked in the repo.
- Carries the DESIGN.md §5/§9/§13 edits from the secret-loss discussion:
fail-closed (not self-healed) TerdutAlertSource webhook Secret loss, and
the corrected RBAC section (the webhook Secret lives in the CR's tenant
namespace, not the operator's own namespace as an earlier draft claimed).
Niklas Ye