fix: update OpenAI model in onboarding and policy helpers for consistency

- Changed OpenAI model from 'gpt-5-nano' to 'gpt-5-mini' in onboarding and policy content generation functions to ensure uniformity across tasks.
- This update aims to maintain performance while aligning with recent enhancements in the onboarding process.

Author: Marfuen

apps/app/src/jobs/tasks/onboarding/onboard-organization-helpers.ts

@@ -155,7 +155,7 @@ export async function createVendorRiskComment(
       : 'No specific policies available - use standard security policy guidance.';
 
   const riskMitigationComment = await generateText({
-    model: openai('gpt-5-nano'),
+    model: openai('gpt-5-mini'),
     system: VENDOR_RISK_ASSESSMENT_PROMPT,
     prompt: `Vendor: ${vendor.name} (${vendor.category}) - ${vendor.description}. Website: ${vendor.website}.
 
@@ -280,7 +280,7 @@ export async function createRiskMitigationComment(
       : 'No specific policies available - use standard security policy guidance.';
 
   const mitigation = await generateText({
-    model: openai('gpt-5-nano'),
+    model: openai('gpt-5-mini'),
     system: RISK_MITIGATION_PROMPT,
     prompt: `Risk: ${risk.title} (${risk.category} / ${risk.department})\n\nDescription:\n${risk.description}\n\nTreatment Strategy:\n${risk.treatmentStrategy}: ${risk.treatmentStrategyDescription || 'N/A'}\n\nResidual Assessment: Likelihood ${risk.likelihood}, Impact ${risk.impact}\n\nAvailable Organization Policies:\n${policiesContext}\n\nWrite a pragmatic mitigation plan with concrete steps the team can implement in the next 30-90 days.`,
   });

apps/app/src/jobs/tasks/onboarding/update-policies-helpers.ts

@@ -194,7 +194,7 @@ export async function reconcileFormatWithTemplate(
 ): Promise<{ type: 'document'; content: Record<string, unknown>[] }> {
   try {
     const { object } = await generateObject({
-      model: openai('gpt-5-nano'),
+      model: openai('gpt-5-mini'),
       mode: 'json',
       system: `You are an expert policy editor.
 Given an ORIGINAL policy TipTap JSON and a DRAFT TipTap JSON, produce a FINAL TipTap JSON that:
@@ -232,7 +232,7 @@ export async function aiCheckFormatWithTemplate(
 ): Promise<{ isConforming: boolean; reasons: string[] }> {
   try {
     const { object } = await generateObject({
-      model: openai('gpt-5-nano'),
+      model: openai('gpt-5-mini'),
       mode: 'json',
       system: `You are validating policy layout.
 Compare ORIGINAL vs DRAFT (TipTap JSON). Determine if DRAFT conforms to ORIGINAL format:
@@ -457,7 +457,7 @@ export async function generatePolicyContent(prompt: string): Promise<{
 }> {
   try {
     const { object } = await generateObject({
-      model: openai('gpt-5-nano'),
+      model: openai('gpt-5-mini'),
       mode: 'json',
       system: `You are an expert at writing security policies. Generate content directly as TipTap JSON format.