Address code review feedback: add required constraints and fix field types

Co-authored-by: xuyushun441-sys <255036401+xuyushun441-sys@users.noreply.github.com>

Author: Copilot

packages/core/src/data/contact.object.ts

@@ -46,7 +46,7 @@ export const contactObject = {
     mobile: {
       name: 'mobile',
       label: 'Mobile',
-      type: 'text'
+      type: 'phone'
     },
 
     account: {

packages/examples/src/data/case.object.ts

@@ -19,7 +19,8 @@ export const caseObject = {
       name: 'case_number',
       label: 'Case Number',
       type: 'text',
-      unique: true
+      unique: true,
+      required: true
     },
 
     subject: {

packages/examples/src/data/contract.object.ts

@@ -19,7 +19,8 @@ export const contractObject = {
       name: 'contract_number',
       label: 'Contract Number',
       type: 'text',
-      unique: true
+      unique: true,
+      required: true
     },
 
     contract_name: {

packages/examples/src/data/lead.object.ts

@@ -47,7 +47,8 @@ export const leadObject = {
       name: 'email',
       label: 'Email',
       type: 'email',
-      required: true
+      required: true,
+      unique: true
     },
 
     phone: {

packages/examples/src/data/quote.object.ts

@@ -19,7 +19,8 @@ export const quoteObject = {
       name: 'quote_number',
       label: 'Quote Number',
       type: 'text',
-      unique: true
+      unique: true,
+      required: true
     },
 
     name: {