v5.0.3

What's Changed

• Fix Zenodo metadata preservation and draft recovery by @HiroYokoyama in #173
• Fix recovery of Zenodo drafts without an assigned version by @HiroYokoyama in #174
• Adopt pinned shared maintenance tools and canonical API checker by @HiroYokoyama in #175
• Remove redundant Japanese v5 migration guide by @HiroYokoyama in #176
• Refactor test organization and eliminate order-dependent failures by @HiroYokoyama in #177
• Fix main-app audit findings and release 5.0.3 by @HiroYokoyama in #178

Full Changelog: v5.0.2...v5.0.3