adding support for generic AI provider (OpenAI compatible)

packages/backend/src/agents/ranking.ts

@@ -1,4 +1,4 @@
-import { openai } from '../agent.js';
+import { openai, defaultModel, serviceOptions } from '../agent.js';
 import type { InterpreterOutput, RetrievalOutput, RankingOutput, MediaType } from '../types/agents.js';
 import { z } from 'zod';
 import { zodTextFormat } from 'openai/helpers/zod';
@@ -42,9 +42,9 @@ export async function runRanking(
     const chunkTitles = chunk.map((c) => `- ${c.title}: ${c.reason}`).join('\n');
 
     const response = await openai.responses.parse({
-      model: 'gpt-5.4',
+      model: defaultModel,
       temperature: 0.2,
-      service_tier: 'flex',
+      ...serviceOptions,
       text: { format: zodTextFormat(RankingSchema, "ranking") },
       instructions: `You are a ${mediaLabel} ranking critic. Assign each ${mediaLabel} to exactly one of four confidence buckets based on how well it matches the user's preferences.