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/scripts/patch-zod-buffer.js

@@ -0,0 +1,19 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const fs_1 = __importDefault(require("fs"));
+const path_1 = __importDefault(require("path"));
+const dir = path_1.default.resolve(__dirname, '../shared/schemas/objects');
+fs_1.default.readdirSync(dir).forEach(file => {
+    if (!file.endsWith('.schema.ts'))
+        return;
+    const full = path_1.default.join(dir, file);
+    let content = fs_1.default.readFileSync(full, 'utf8');
+    if (content.includes('z.instanceof(Buffer)') && !content.includes("import { Buffer")) {
+        content = `import { Buffer } from 'buffer';\n` + content;
+        fs_1.default.writeFileSync(full, content);
+        console.log('Patched:', file);
+    }
+});