Implement expense tracking foundation for v1

prisma/migrations/20260323161757_init/migration.sql

@@ -0,0 +1,28 @@
+-- CreateTable
+CREATE TABLE "Expense" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "date" TEXT NOT NULL,
+    "title" TEXT NOT NULL,
+    "amountCents" INTEGER NOT NULL,
+    "category" TEXT NOT NULL,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+-- CreateTable
+CREATE TABLE "Paycheck" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "payDate" TEXT NOT NULL,
+    "amountCents" INTEGER NOT NULL,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+-- CreateTable
+CREATE TABLE "MonthlyInsight" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "month" TEXT NOT NULL,
+    "year" INTEGER NOT NULL,
+    "generatedAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "summary" TEXT NOT NULL,
+    "recommendations" TEXT NOT NULL,
+    "inputSnapshot" TEXT NOT NULL
+);