refactor: update example rwd-lineage.xml files to current spec

Migrate both example XML files from the old schema to the current
RWD Lineage Data Standard Specification:

- Namespace: rwd-lineage/v1 → rwdl/v1.0 with rwdl: prefix throughout
- Root element: <RWDLineage> → <rwdl:Lineage> (file-header attributes removed)
- MapIDs wrapped in <rwdl:LineageTrail>
- Attribute casing: uuid → UUID, storage → Storage, structure → Structure
- Storage/Structure enum values uppercased (Filesystem → FILESYSTEM, etc.)
- <Transformation> element replaced by MethodDefOID attribute on MapID
- <TextSpan> elements removed (example 1; not in current spec)
- Format="CSV" attribute added to all Filesystem coordinates
- <rwdl:SourceMetadata> block added to both documents

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: tnagamine