fix(P2-058): complete migration column alignment with models
- VersionRelease: add storage fields, file counters, timestamps
- UpstreamTodo: add branch_name, assigned_to, started_at
- DiffCache: add new_content, lines_added/removed, metadata casts
- AnalysisLog: use version_release_id and error_message
- Asset: add slug, name, licence fields, install details
- AssetVersion: add changelog, breaking_changes, paths
- Webhook tables: fix foreign key to uptelligence_vendors
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>