feat: iddianame-first case summary + remove hardcoded AI endpoint

- summarizeCase: if an iddianame is among the case's documents, run a
  narrow first-pass analysis on it alone (isnatEdilenSuc, iddiaOzeti,
  onemliTarihler), then feed that as context into the general
  case-wide evaluation instead of treating every document equally.
- ANALYSIS_SYSTEM_PROMPT no longer asks the AI to guess "taraflar" -
  that now comes from real UYAP data (cases.parties) instead.
- Removed the hardcoded RunPod proxy URL fallback from every call
  site (document/chat/precedent controllers + lib/openai.ts) - it was
  a real infra endpoint checked into source. New lib/aiConfig.ts
  throws if RUNPOD_API_BASE_URL isn't set rather than silently
  falling back to it.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/lib/openai.ts

@@ -15,11 +15,11 @@ dotenv.config();
 // ----------------------------------------------
 
 // --- MİZAN (RUNPOD) CONFIGURATION ---
-const runpodBaseUrl = process.env.RUNPOD_API_BASE_URL || 'https://q190env94stwis-11434.proxy.runpod.net/v1';
+// Gerçek adresi kod içinde sabit tutmuyoruz (bkz. lib/aiConfig.ts) — sadece env'den okunuyor.
+const runpodBaseUrl = process.env.RUNPOD_API_BASE_URL ? `${process.env.RUNPOD_API_BASE_URL}/v1` : undefined;
 const runpodApiKey = process.env.RUNPOD_API_KEY || 'dummy-key';
 
-export const openai = new OpenAI({
-  baseURL: runpodBaseUrl,
-  apiKey: runpodApiKey,
-});
+export const openai = runpodBaseUrl
+  ? new OpenAI({ baseURL: runpodBaseUrl, apiKey: runpodApiKey })
+  : null;
 // ------------------------------------