Add selected provider stack setup

.env.example

@@ -9,20 +9,27 @@ PRODUCTION_APP_URL=https://polymarket-site-eta.vercel.app
 LIVE_TRADING_ENABLED=false
 
 # Accounts / authentication
-AUTH_PROVIDER=
+AUTH_PROVIDER=Clerk
+CLERK_PUBLISHABLE_KEY=
+CLERK_SECRET_KEY=
+CLERK_WEBHOOK_SIGNING_SECRET=
 DATABASE_URL=
+NEON_DATABASE_URL=
 SESSION_SECRET=
 ACCOUNT_SESSION_SECRET=
 ENCRYPTION_KEY=
 PMA_ACCOUNTS_INDEX_PATH=accounts/index.json
 
 # Eligibility / compliance provider
-KYC_PROVIDER=
+KYC_PROVIDER=Veriff
 KYC_API_KEY=
 KYC_WEBHOOK_SECRET=
-SANCTIONS_PROVIDER=
+VERIFF_API_KEY=
+VERIFF_SECRET_KEY=
+VERIFF_WEBHOOK_SECRET=
+SANCTIONS_PROVIDER=Veriff
 SANCTIONS_API_KEY=
-GEOIP_PROVIDER=
+GEOIP_PROVIDER=Veriff
 GEOIP_API_KEY=
 RESTRICTED_JURISDICTIONS=US,CA-NY,CA-ON
 TERMS_VERSION=
@@ -31,16 +38,19 @@ RISK_DISCLOSURE_VERSION=
 MARKET_POLICY_STORE=
 
 # Wallet / deposit-wallet provider
-WALLET_PROVIDER=
+WALLET_PROVIDER=Circle
 WALLET_PROJECT_ID=
 WALLET_API_KEY=
+CIRCLE_WALLET_SET_ID=
 DEPOSIT_WALLET_ADDRESS=
 POLYMARKET_SIGNATURE_TYPE=3
 
 # Payments / deposits / withdrawals
-PAYMENTS_PROVIDER=
+PAYMENTS_PROVIDER=Circle
 PAYMENTS_API_KEY=
 PAYMENTS_WEBHOOK_SECRET=
+CIRCLE_API_KEY=
+CIRCLE_WEBHOOK_SECRET=
 WEBHOOK_BASE_URL=
 SETTLEMENT_ASSET=pUSD
 SETTLEMENT_CHAIN=polygon
@@ -58,6 +68,11 @@ ACCOUNTING_EXPORT_STORE=
 RATE_LIMIT_STORE=
 AUDIT_LOG_STORE=
 MONITORING_DSN=
+SENTRY_DSN=
+SENTRY_AUTH_TOKEN=
+SENTRY_ORG=
+SENTRY_PROJECT=
+SENTRY_WEBHOOK_URL=
 INCIDENT_WEBHOOK_URL=
 ADMIN_ALERT_EMAIL=
 CUSTOMER_SUPPORT_EMAIL=