Voegt een verplicht code-veld toe aan Sprint, sequentieel per product
(consistent met PBI-N, ST-NNN, T-N).
- **Schema** — `Sprint.code String @db.VarChar(30)` + `@@unique([product_id, code])`
- **Migratie** — voegt kolom toe als nullable, backfillt bestaande sprints
via `ROW_NUMBER() OVER (PARTITION BY product_id ORDER BY created_at)`
als `SP-N`, en zet daarna NOT NULL + UNIQUE.
- **Generator** — `generateNextSprintCode(productId)` in lib/code-server.ts
volgt het patroon van story/pbi/task; createSprintAction gebruikt
`createWithCodeRetry` voor race-bescherming.
- **Seed** — sprint-counter per product (`SP-1`, `SP-2`, ...).
Zichtbaar in:
- Sprint-header (`Product › Sprint actief · SP-3`)
- JobCard + JobDetailPane voor SPRINT_IMPLEMENTATION jobs
- Insights: VelocityChart x-axis (compacter dan goal-truncated),
AlignmentTrend tooltip, SprintInfoStrip
- actions/jobs-page.ts: `sprintCode` is weer een echte code i.p.v. null
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Vercel build was failing with TS18047 — `sprint.completed_at` is
possibly `null`. The earlier `.filter(s => s.completed_at != null)`
runtime-filtered the nulls out but did NOT narrow the element type;
TypeScript still saw `Date | null` on the result.
Add a user-defined type guard `(s): s is SprintWithCompletedAt =>` so
the narrowed array carries `completed_at: Date`. No runtime change.
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Aggregates task.status=DONE counts across last N completed sprints
(default 5), filtered by productAccessFilter and returned in
chronological order for x-axis rendering.
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
