fix: extract appointmentDate for multi_claim/batch_claim/preauth intents

The classifier prompt only told the AI that appointmentDate applies to
schedule_appointment/claim_only/check_and_claim, so a trailing date like
"all on 6/23/26" was dropped for multi-patient claims even though the
workflow already reads c.appointmentDate for those intents and silently
defaulted to today.

Also add Prisma config/seed scripts and shopping-vendor types/schema updates.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/db/prisma/prisma.config.js

@@ -0,0 +1,18 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const dotenv_1 = __importDefault(require("dotenv"));
+const path_1 = __importDefault(require("path"));
+const config_1 = require("prisma/config");
+dotenv_1.default.config({ path: path_1.default.resolve(__dirname, ".env") });
+exports.default = (0, config_1.defineConfig)({
+    schema: "schema.prisma",
+    datasource: {
+        url: (0, config_1.env)("DATABASE_URL"),
+    },
+    migrations: {
+        seed: "ts-node prisma/seed.ts",
+    },
+});