fix(studio): early fail query when x-connection-encrypted is invalid (#35331)

* fix(studio): early fail query when x-connection-encrypted is invalid

* fix(studio): uniformize readDatabase and projectDetails connString handling

* chore: update api types

* chore: add connectionString null option

* fix: only enforce x-connection-encrypted on platform

* chore: refactor connString check in a single point

* chore: fix guard logic

* chore: fix pgMetaGuard

* chore: fix types

apps/studio/data/sql/execute-sql-query.ts

@@ -1,6 +1,6 @@
 import { QueryKey, useQuery, UseQueryOptions } from '@tanstack/react-query'
 
-import { handleError as handleErrorFetchers, post } from 'data/fetchers'
+import { handleError as handleErrorFetchers, isValidConnString, post } from 'data/fetchers'
 import { useSelectedProject } from 'hooks/misc/useSelectedProject'
 import { MB, PROJECT_STATUS } from 'lib/constants'
 import {
@@ -12,7 +12,7 @@ import { sqlKeys } from './keys'
 
 export type ExecuteSqlVariables = {
   projectRef?: string
-  connectionString?: string
+  connectionString?: string | null
   sql: string
   queryKey?: QueryKey
   handleError?: (error: ResponseError) => { result: any }
@@ -42,6 +42,7 @@ export async function executeSql(
   headersInit?: HeadersInit
 ): Promise<{ result: any }> {
   if (!projectRef) throw new Error('projectRef is required')
+  if (!isValidConnString(connectionString)) throw new Error('Project connection string is required')
 
   const sqlSize = new Blob([sql]).size
   // [Joshen] I think the limit is around 1MB from testing, but its not exactly 1MB it seems