graduate auto-RLS project creation experiment (test variant wins) (#43499)

## Problem

The `projectCreationEnableRlsEventTrigger` A/B experiment tested showing
an opt-in "Enable automatic RLS" checkbox in the project creation flow,
which sets up a Postgres event trigger to auto-enable RLS on every new
table in the public schema. The test variant passed with a +3.3pp lift.

## Changes

- `SecurityOptions.tsx` — removed PostHog flag check, checkbox is now
always rendered
- `pages/new/[slug].tsx` — removed experiment flag reads, exposure
tracking (`useTrackExperimentExposure`), and the conditional
`rlsOptionVariant` telemetry property

The underlying feature logic (`enableRlsEventTrigger` form field,
`AUTO_ENABLE_RLS_EVENT_TRIGGER_SQL`, submission handling) is unchanged —
we're just removing the scaffolding that was gating it.

## Testing

Verified `pnpm typecheck` passes clean. The "Enable automatic RLS"
checkbox now shows unconditionally in the Security Options section of
project creation.

GROWTH-653

apps/studio/components/interfaces/ProjectCreation/SecurityOptions.tsx

@@ -1,5 +1,4 @@
 import Panel from 'components/ui/Panel'
-import { usePHFlag } from 'hooks/ui/useFlag'
 import Link from 'next/link'
 import { UseFormReturn } from 'react-hook-form'
 import {
@@ -22,10 +21,6 @@ interface SecurityOptionsProps {
 }
 
 export const SecurityOptions = ({ form, layout = 'horizontal' }: SecurityOptionsProps) => {
-  const rlsExperimentVariant = usePHFlag<'control' | 'test' | false | undefined>(
-    'projectCreationEnableRlsEventTrigger'
-  )
-  const shouldShowEnableRlsEventTrigger = rlsExperimentVariant === 'test'
   const dataApi = useWatch_Shadcn_({ control: form.control, name: 'dataApi' })
 
   return (
@@ -65,32 +60,30 @@ export const SecurityOptions = ({ form, layout = 'horizontal' }: SecurityOptions
             )}
           />
 
-          {shouldShowEnableRlsEventTrigger && (
-            <FormField_Shadcn_
-              name="enableRlsEventTrigger"
-              control={form.control}
-              render={({ field }) => (
-                <FormItem_Shadcn_ className="flex items-start gap-3">
-                  <FormControl_Shadcn_>
-                    <Checkbox_Shadcn_
-                      checked={field.value}
-                      disabled={field.disabled}
-                      onCheckedChange={(value) => field.onChange(value === true)}
-                    />
-                  </FormControl_Shadcn_>
-                  <div className="space-y-1">
-                    <FormLabel_Shadcn_ className="text-sm text-foreground">
-                      Enable automatic RLS
-                    </FormLabel_Shadcn_>
-                    <FormDescription_Shadcn_ className="text-foreground-lighter">
-                      Create an event trigger that automatically enables Row Level Security on all
-                      new tables in the public schema.
-                    </FormDescription_Shadcn_>
-                  </div>
-                </FormItem_Shadcn_>
-              )}
-            />
-          )}
+          <FormField_Shadcn_
+            name="enableRlsEventTrigger"
+            control={form.control}
+            render={({ field }) => (
+              <FormItem_Shadcn_ className="flex items-start gap-3">
+                <FormControl_Shadcn_>
+                  <Checkbox_Shadcn_
+                    checked={field.value}
+                    disabled={field.disabled}
+                    onCheckedChange={(value) => field.onChange(value === true)}
+                  />
+                </FormControl_Shadcn_>
+                <div className="space-y-1">
+                  <FormLabel_Shadcn_ className="text-sm text-foreground">
+                    Enable automatic RLS
+                  </FormLabel_Shadcn_>
+                  <FormDescription_Shadcn_ className="text-foreground-lighter">
+                    Create an event trigger that automatically enables Row Level Security on all new
+                    tables in the public schema.
+                  </FormDescription_Shadcn_>
+                </div>
+              </FormItem_Shadcn_>
+            )}
+          />
 
           {!dataApi && (
             <Admonition

apps/studio/pages/new/[slug].tsx

@@ -11,8 +11,8 @@ import { DisabledWarningDueToIncident } from 'components/interfaces/ProjectCreat
 import { FreeProjectLimitWarning } from 'components/interfaces/ProjectCreation/FreeProjectLimitWarning'
 import { OrganizationSelector } from 'components/interfaces/ProjectCreation/OrganizationSelector'
 import {
-  PostgresVersionSelector,
   extractPostgresVersionDetails,
+  PostgresVersionSelector,
 } from 'components/interfaces/ProjectCreation/PostgresVersionSelector'
 import { sizes } from 'components/interfaces/ProjectCreation/ProjectCreation.constants'
 import { FormSchema } from 'components/interfaces/ProjectCreation/ProjectCreation.schema'
@@ -44,7 +44,6 @@ import { useAsyncCheckPermissions } from 'hooks/misc/useCheckPermissions'
 import { useIsFeatureEnabled } from 'hooks/misc/useIsFeatureEnabled'
 import { useLocalStorageQuery } from 'hooks/misc/useLocalStorage'
 import { useSelectedOrganizationQuery } from 'hooks/misc/useSelectedOrganization'
-import { useTrackExperimentExposure } from 'hooks/misc/useTrackExperimentExposure'
 import { withAuth } from 'hooks/misc/withAuth'
 import { usePHFlag } from 'hooks/ui/useFlag'
 import { DOCS_URL, PROJECT_STATUS, PROVIDERS, useDefaultProvider } from 'lib/constants'
@@ -57,9 +56,9 @@ import { useForm } from 'react-hook-form'
 import { AWS_REGIONS, type CloudProvider } from 'shared-data'
 import { toast } from 'sonner'
 import type { NextPageWithLayout } from 'types'
-import { Button, FormField_Shadcn_, Form_Shadcn_, useWatch_Shadcn_ } from 'ui'
-import ConfirmationModal from 'ui-patterns/Dialogs/ConfirmationModal'
+import { Button, Form_Shadcn_, FormField_Shadcn_, useWatch_Shadcn_ } from 'ui'
 import { Admonition } from 'ui-patterns/admonition'
+import ConfirmationModal from 'ui-patterns/Dialogs/ConfirmationModal'
 import { z } from 'zod'
 
 const sizesWithNoCostConfirmationRequired: DesiredInstanceSize[] = ['micro', 'small']
@@ -72,10 +71,6 @@ const Wizard: NextPageWithLayout = () => {
   const { profile } = useProfile()
 
   const { data: currentOrg } = useSelectedOrganizationQuery()
-  const rlsExperimentVariant = usePHFlag<'control' | 'test' | false | undefined>(
-    'projectCreationEnableRlsEventTrigger'
-  )
-  const shouldShowEnableRlsEventTrigger = rlsExperimentVariant === 'test'
   const isFreePlan = currentOrg?.plan?.id === 'free'
   const canChooseInstanceSize = !isFreePlan
 
@@ -250,9 +245,6 @@ const Wizard: NextPageWithLayout = () => {
         {
           instanceSize: form.getValues('instanceSize'),
           enableRlsEventTrigger: form.getValues('enableRlsEventTrigger'),
-          ...((rlsExperimentVariant === 'control' || rlsExperimentVariant === 'test') && {
-            rlsOptionVariant: rlsExperimentVariant,
-          }),
           dataApiEnabled: form.getValues('dataApi'),
           useOrioleDb: form.getValues('useOrioleDb'),
         },
@@ -389,15 +381,6 @@ const Wizard: NextPageWithLayout = () => {
     }
   }, [instanceSize, watchedInstanceSize, form])
 
-  // Track exposure to RLS option experiment (only when explicitly assigned to a variant)
-  const shouldTrackRlsExposure =
-    !!currentOrg?.slug && (rlsExperimentVariant === 'control' || rlsExperimentVariant === 'test')
-
-  useTrackExperimentExposure(
-    'project_creation_rls_option',
-    shouldTrackRlsExposure ? rlsExperimentVariant : undefined
-  )
-
   return (
     <Form_Shadcn_ {...form}>
       <form onSubmit={form.handleSubmit(onSubmitWithComputeCostsConfirmation)}>