feat(story): add Epic/Story data model + REST CRUD (Phase 7a)

2026-07-03T23:46:26+00:00

Pure data model + CRUD -- no orchestration behavior yet (that's Phase 7b). Revives ADR-007's stories concept (adapted; ADR-007 itself was deleted as "more machinery than the usage pattern needed") while staying lean: reuses the existing events/projects/task-tree machinery rather than building a parallel hierarchy. - internal/story: Epic/Story types. Epic is a loosely-scoped initiative (OPEN/CLOSED, no execution semantics). Story is a shippable slice of work realized by a task tree rooted at root_task_id; epic_id/project_id/ root_task_id are loose references (no FK enforcement, matching the codebase's existing tolerance for unmatched reference strings like tasks.project). - storage: new epics/stories tables (additive migrations) + CRUD methods. Story status is intentionally unvalidated pass-through in this phase -- no task.ValidTransition-style state machine, since there's no orchestrator yet to make transitions meaningful. - event: 9 new Kind constants for the ceremony this layer will eventually drive (epic_proposed, discovery_proposed, framing_decided, groomed, prioritized, eval_verdict, arbitration_decided, retro_captured, human_accepted) -- defined but nothing emits them yet. - api: GET/POST /api/epics, GET/PUT /api/epics/{id}, GET /api/epics/{id}/stories, GET/POST /api/stories, GET/PUT /api/stories/{id}, and GET /api/stories/{id}/task-tree -- BFS walk from root_task_id following both parent_task_id children and depends_on-edge dependents (visited-set guarded), returning a flat node list for a later UI phase to render as a graph. Unauthenticated, matching the existing projects/tasks endpoints' posture. go build/vet/test -race -count=1 all pass, full suite. Co-Authored-By: Claude Sonnet 5 Claude-Session: https://claude.ai/code/session_01V1moSNCJRcP6kykA4tyUSs

claudomator.git/internal/story/story.go, branch main

feat(story): add Epic/Story data model + REST CRUD (Phase 7a)