v5.1.0

What's Changed

• feat: add crash recovery simulation (Epic #145) by @ringo380 in #196
• feat: add incremental backup analysis (Epic #146) by @ringo380 in #197
• feat: add index bloat scoring and cardinality estimation (Epic #147) by @ringo380 in #198
• feat: complete v5.1 milestone — verify backup-meta, audit bloat alerts, docs by @ringo380 in #199

Full Changelog: v5.0.0...v5.1.0