5b4452b9fe
Closes issue 0119. Implementation lives in the kanban_cpp sub-repo (apps/kanban_cpp/backend/). See sub-repo commit 0b93a98 for details. DoD: - [x] issues_source.go parses frontmatter via yaml.v3 - [x] flows_source.go idem (distinct status->column mapping) - [x] frontmatter_edit.go atomic PatchFrontmatterField - [x] GET /api/boards/issues/cards (smoke: 87 cards) - [x] GET /api/boards/flows/cards (smoke: 9 cards) - [x] PATCH /api/boards/issues/cards/0119 status=en-curso (mtime change verified) - [x] POST /api/boards/issues/cards/0119/launch -> 502 with suggestion - [x] Tests *_test.go: 4 + 3 + 3 + 1 cache cases, all green - [x] Cache 30s thread-safe (mutex) - [x] Taxonomy 0103 respected — only canonical statuses accepted on PATCH Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>