Eliminate Duplicate Configuration Files Across Repos

Per docs-doctrine Phase 2, config files that exist in multiple locations must be resolved: one canonical source, all others derived or deleted. No "co-equal" config files allowed.

Acceptance Criteria

• [ ] Audit all repos for config files that appear in more than one location
• [ ] For each duplicate set, designate one as canonical and mark others as derived (with source header) or delete
• [ ] Ensure remaining derived configs have proper YAML front matter (type: derived, source:, sync:, sla:)
• [ ] Verify no config file claims canonical authority in more than one location