v8.0.0

What's Changed

• Consolidate API and CLI composition roots by @9orky in #124
• Make the runtime registry authoritative for fixture coverage by @9orky in #125
• Reuse the application catalog per process by @9orky in #126
• Establish a hermetic fast validation tier by @9orky in #127
• Replace reflective discovery with feature descriptors by @9orky in #128
• Protect diagram command character boundaries by @9orky in #129
• Preserve class relation source and target direction by @9orky in #130
• Fix TreeView cascade deletion by @9orky in #131
• Freeze snapshot schema version 5 by @9orky in #132
• Unify Mermaid version and validation pipeline by @9orky in #133
• Align configuration contracts with Mermaid schema by @9orky in #134
• Enforce neutral shared diagram ownership by @9orky in #135
• Use one locked development workflow by @9orky in #136
• Run CI validation groups in parallel by @9orky in #137
• Repair documentation and packaging contracts by @9orky in #138

Full Changelog: v7.0.1...v8.0.0