This is the final phase of the Edge Schema Consolidation. It removes
the deprecated edge fields (RepliesTo, RelatesTo, DuplicateOf, SupersededBy)
from the Issue struct and all related code.
Changes:
- Remove edge fields from types.Issue struct
- Remove edge field scanning from queries.go and transaction.go
- Update graph_links_test.go to use dependency API exclusively
- Update relate.go to use AddDependency/RemoveDependency
- Update show.go with helper functions for thread traversal via deps
- Update mail_test.go to verify thread links via dependencies
- Add migration 022 to drop columns from issues table
- Fix cycle detection to allow bidirectional relates-to links
- Fix migration 022 to disable foreign keys before table recreation
All edge relationships now use the dependencies table exclusively.
The old Issue fields are fully removed.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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