Support for duplicated mapping entry

Duplicate DcimDevice mappings skip site-only devices on incremental runs. list_changed_since() takes the first schema_mapping entry for a kind, so cursor-driven syncs will only apply the rack-filtered block here. Merge the rack/site filters into one mapping, or make the incremental lookup handle all matching entries.


https://github.com/opsmill/infrahub-sync/pull/134#discussion_r3536297915