db: Foreign Keys für blocker- und Tageseintrag-Verweise (Migration 0017)

Bisher reine uuid-Spalten ohne referenzielle Integritaet -> Orphan-Risiko, wenn
das Ziel geloescht wird. Jetzt echte FKs mit ON DELETE SET NULL:

- day_entry.blocker_id -> blocker
- blocker.area_id -> area
- blocker.project_id -> project

Migration bereinigt vorab verwaiste IDs (UPDATE ... SET NULL), damit ADD
CONSTRAINT auf Altdaten nicht bricht. Verifiziert: alle 18 Migrationen laufen
gegen frische Postgres 16 durch, FKs angelegt.

(todo.bezug_id / time_entry.bezug_id bleiben FK-frei: echt polymorph ueber
bezug_kind project/deal/campaign — kein einzelner FK moeglich.)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/db/migrations/0017_rare_oracle.sql

@@ -0,0 +1,8 @@
+-- Verwaiste Verweise vor dem Setzen der Foreign Keys auf NULL bereinigen — sonst
+-- schlaegt ADD CONSTRAINT fehl, falls Altdaten auf geloeschte Zeilen zeigen.
+UPDATE "blocker" SET "area_id" = NULL WHERE "area_id" IS NOT NULL AND "area_id" NOT IN (SELECT "id" FROM "area");--> statement-breakpoint
+UPDATE "blocker" SET "project_id" = NULL WHERE "project_id" IS NOT NULL AND "project_id" NOT IN (SELECT "id" FROM "project");--> statement-breakpoint
+UPDATE "day_entry" SET "blocker_id" = NULL WHERE "blocker_id" IS NOT NULL AND "blocker_id" NOT IN (SELECT "id" FROM "blocker");--> statement-breakpoint
+ALTER TABLE "blocker" ADD CONSTRAINT "blocker_area_id_area_id_fk" FOREIGN KEY ("area_id") REFERENCES "public"."area"("id") ON DELETE set null ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "blocker" ADD CONSTRAINT "blocker_project_id_project_id_fk" FOREIGN KEY ("project_id") REFERENCES "public"."project"("id") ON DELETE set null ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "day_entry" ADD CONSTRAINT "day_entry_blocker_id_blocker_id_fk" FOREIGN KEY ("blocker_id") REFERENCES "public"."blocker"("id") ON DELETE set null ON UPDATE no action;

packages/db/migrations/meta/_journal.json

@@ -120,6 +120,13 @@
       "when": 1780771242601,
       "tag": "0016_project_logo_url",
       "breakpoints": true
+    },
+    {
+      "idx": 17,
+      "version": "7",
+      "when": 1780826387755,
+      "tag": "0017_rare_oracle",
+      "breakpoints": true
     }
   ]
 }

packages/db/src/schema.ts

@@ -231,7 +231,7 @@ export const dayEntry = pgTable(
     ampel: text('ampel', { enum: ['green', 'amber', 'red'] }),
     trend: text('trend', { enum: ['besser', 'gleich', 'schlechter'] }),
     url: text('url'),
-    blockerId: uuid('blocker_id'),
+    blockerId: uuid('blocker_id').references(() => blocker.id, { onDelete: 'set null' }),
     editLockedAt: timestamp('edit_locked_at', { withTimezone: true }),
     publishedAt: timestamp('published_at', { withTimezone: true }),
     createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
@@ -442,8 +442,8 @@ export const blocker = pgTable(
       .primaryKey(),
     title: text('title').notNull(),
     description: text('description'),
-    areaId: uuid('area_id'),
-    projectId: uuid('project_id'),
+    areaId: uuid('area_id').references(() => area.id, { onDelete: 'set null' }),
+    projectId: uuid('project_id').references(() => project.id, { onDelete: 'set null' }),
     ownerUserId: uuid('owner_user_id').references(() => user.id, { onDelete: 'set null' }),
     openedBy: uuid('opened_by')
       .notNull()