Adjust AI model settings and improve video metadata update functionality

Modify AI service to remove temperature setting and update storage logic to allow all metadata updates for admin edits in BunnyStorage.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 170e18f0-0f13-4eca-8643-546bba1dd8cc
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/170e18f0-0f13-4eca-8643-546bba1dd8cc/LY6xmBI

server/aiService.ts

@@ -57,7 +57,6 @@ Odgovori samo z opisom, brez dodatnih pojasnil.`;
         }
       ],
       max_completion_tokens: Math.ceil(maxCharacters / 2), // Rough estimate: 2 characters per token
-      temperature: 0.7,
     });
 
     const description = response.choices[0].message.content?.trim() || "";