feat(PBI-59): Sprint.code (SP-N sequentieel per product) (#153)

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>

lib/insights/burndown.ts

@@ -9,6 +9,7 @@ export interface BurndownDay {
 
 export interface BurndownSprint {
   sprintId: string
+  sprintCode: string
   productId: string
   productName: string
   sprintGoal: string
@@ -62,6 +63,7 @@ export async function getBurndownData(userId: string): Promise<BurndownSprint[]>
     },
     select: {
       id: true,
+      code: true,
       sprint_goal: true,
       created_at: true,
       completed_at: true,
@@ -77,6 +79,7 @@ export async function getBurndownData(userId: string): Promise<BurndownSprint[]>
 
       return {
         sprintId: sprint.id,
+        sprintCode: sprint.code,
         productId: sprint.product.id,
         productName: sprint.product.name,
         sprintGoal: sprint.sprint_goal,

lib/insights/token-history.ts

@@ -2,6 +2,7 @@ import { prisma } from '@/lib/prisma'
 
 export interface SprintTokenRow {
   sprintId: string
+  sprintCode: string
   sprintGoal: string
   totalTokens: number
   totalCostUsd: number
@@ -24,6 +25,7 @@ export interface PbiTokenRow {
 
 type RawSprintRow = {
   sprint_id: string
+  sprint_code: string
   sprint_goal: string
   total_tokens: bigint
   total_cost: number | null
@@ -53,6 +55,7 @@ export async function getSprintTokenHistory(
     ? await prisma.$queryRaw<RawSprintRow[]>`
         SELECT
           sp.id AS sprint_id,
+          sp.code AS sprint_code,
           sp.sprint_goal,
           COALESCE(SUM(cj.input_tokens + cj.output_tokens + cj.cache_read_tokens + cj.cache_write_tokens), 0) AS total_tokens,
           SUM(
@@ -70,13 +73,14 @@ export async function getSprintTokenHistory(
         WHERE cj.user_id = ${userId}
           AND cj.status = 'DONE'
           AND cj.product_id = ${productId}
-        GROUP BY sp.id, sp.sprint_goal
+        GROUP BY sp.id, sp.code, sp.sprint_goal
         ORDER BY sp.created_at DESC
         LIMIT ${limit}
       `
     : await prisma.$queryRaw<RawSprintRow[]>`
         SELECT
           sp.id AS sprint_id,
+          sp.code AS sprint_code,
           sp.sprint_goal,
           COALESCE(SUM(cj.input_tokens + cj.output_tokens + cj.cache_read_tokens + cj.cache_write_tokens), 0) AS total_tokens,
           SUM(
@@ -93,13 +97,14 @@ export async function getSprintTokenHistory(
         LEFT JOIN model_prices mp ON mp.model_id = cj.model_id
         WHERE cj.user_id = ${userId}
           AND cj.status = 'DONE'
-        GROUP BY sp.id, sp.sprint_goal
+        GROUP BY sp.id, sp.code, sp.sprint_goal
         ORDER BY sp.created_at DESC
         LIMIT ${limit}
       `
 
   return rows.map(r => ({
     sprintId: r.sprint_id,
+    sprintCode: r.sprint_code,
     sprintGoal: r.sprint_goal,
     totalTokens: Number(r.total_tokens),
     totalCostUsd: Number(r.total_cost ?? 0),

lib/insights/velocity.ts

@@ -3,6 +3,7 @@ import { productAccessFilter } from '@/lib/product-access'
 
 export interface VelocitySprint {
   sprintId: string
+  sprintCode: string
   sprintGoal: string
   productId: string
   productName: string
@@ -25,6 +26,7 @@ export async function getVelocity(userId: string, sprintsBack = 5): Promise<Velo
     take: sprintsBack,
     select: {
       id: true,
+      code: true,
       sprint_goal: true,
       completed_at: true,
       product: { select: { id: true, name: true } },
@@ -42,6 +44,7 @@ export async function getVelocity(userId: string, sprintsBack = 5): Promise<Velo
 
   const result: VelocitySprint[] = chronological.map(sprint => ({
     sprintId: sprint.id,
+    sprintCode: sprint.code,
     sprintGoal: sprint.sprint_goal,
     productId: sprint.product.id,
     productName: sprint.product.name,

lib/insights/verify-stats.ts

@@ -20,6 +20,7 @@ export interface VerifyResultStats {
 
 export interface TrendPoint {
   sprintId: string
+  sprintCode: string
   sprintGoal: string
   productName: string
   alignedRatio: number
@@ -117,6 +118,7 @@ export async function getAlignmentTrend(
     take: sprintsBack,
     select: {
       id: true,
+      code: true,
       sprint_goal: true,
       completed_at: true,
       product: { select: { name: true } },
@@ -137,6 +139,7 @@ export async function getAlignmentTrend(
       const aligned = jobs.filter(j => j.verify_result === 'ALIGNED').length
       return {
         sprintId: sprint.id,
+        sprintCode: sprint.code,
         sprintGoal: sprint.sprint_goal,
         productName: sprint.product.name,
         alignedRatio: jobs.length > 0 ? Math.round((aligned / jobs.length) * 100) : 0,