REFACTORED - migrate the data layer from Prisma to Drizzle (unify the stack)

- Add lib/db (Drizzle schema: 7 tables + 6 enums + relations, postgres.js client),
  drizzle.config.ts, lib/db/enums.ts (Prisma-compatible enum objects)
- Rewrite all 14 app consumers + 4 admin components to Drizzle
- Move the test DB layer to Drizzle + in-process PGlite; convert all 8 integration
  test files + factories (371 tests green)
- Remove Prisma: deps, prisma/ schema+migrations, lib/prisma.ts, Dockerfile prisma
  generate; wire db:generate/migrate/push/studio to drizzle-kit; update Makefile
- Preserve the old seed as scripts/legacy-prisma-seed.cjs (needs a Drizzle rewrite)

tests/integration/media.test.ts

@@ -10,7 +10,8 @@ import {
   getPortfolioMediaBindings,
   replaceEntityMediaUsages,
 } from "@/lib/media";
-import { prisma } from "@/lib/prisma";
+import { db } from "@/lib/db";
+import { mediaUsage } from "@/lib/db/schema";
 import { createMediaAsset as seedAsset } from "@/tests/helpers/factories";
 
 describe("createMediaAsset / getMediaAssetById", () => {
@@ -110,13 +111,11 @@ describe("getPortfolioMediaBindings", () => {
     const section = await seedAsset();
     const asset = await seedAsset();
 
-    await prisma.mediaUsage.createMany({
-      data: [
+    await db.insert(mediaUsage).values([
         { assetId: cover.id, usageType: "PORTFOLIO_COVER", entityType: "portfolio-project", entityId: "proj", fieldKey: "cover" },
         { assetId: section.id, usageType: "PORTFOLIO_SECTION", entityType: "portfolio-project", entityId: "proj", fieldKey: "sec_1" },
         { assetId: asset.id, usageType: "PORTFOLIO_ASSET", entityType: "portfolio-project", entityId: "proj", fieldKey: "ast_1" },
-      ],
-    });
+      ]);
 
     const bindings = await getPortfolioMediaBindings("proj");
     expect(bindings.coverAssetId).toBe(cover.id);
@@ -131,7 +130,5 @@ describe("getPortfolioMediaBindings", () => {
 });
 
 async function createMediaUsageFor(assetId: string) {
-  await prisma.mediaUsage.create({
-    data: { assetId, usageType: "GENERIC", entityType: "e", entityId: "1", fieldKey: "f" },
-  });
+  await db.insert(mediaUsage).values({ assetId, usageType: "GENERIC", entityType: "e", entityId: "1", fieldKey: "f" });
 }