fix(security): widen shopify subdomain regex to allow up to 63 chars

Shopify and RFC 1123 allow labels up to 63 chars; the previous
{1,58} quantifier capped the subdomain at 60 chars and rejected
valid 61–63 char shops with a 400.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: waleedlatif1

apps/sim/lib/api/contracts/oauth-connections.ts

@@ -143,7 +143,7 @@ export const oauthAuthorizeParamsResponseSchema = z.object({
   response_type: z.literal('code'),
 })
 
-const SHOPIFY_SHOP_DOMAIN_REGEX = /^[a-z0-9][a-z0-9-]{1,58}[a-z0-9]\.myshopify\.com$/
+const SHOPIFY_SHOP_DOMAIN_REGEX = /^[a-z0-9][a-z0-9-]{1,61}[a-z0-9]\.myshopify\.com$/
 export const shopifyShopDomainSchema = z.string().regex(SHOPIFY_SHOP_DOMAIN_REGEX)
 
 export const listOAuthConnectionsContract = defineRouteContract({