[Roadmap] multiple Gemini API keys

[darthalex2014]

Why
Users will be able to use multiple Gemini API keys to access the AI, allowing them to bypass rate limits and improve performance, especially when working with Beam and a single AI provider.

Description
Add support for using multiple Gemini API keys in the application.

Requirements

• Environment Variable:
  • Add a new environment variable GEMINI_API_KEYS in src/server/env.mjs to store a comma-separated list of API keys.
• Key Selection Logic:
  • Modify the line const geminiKey = access.geminiKey || env.GEMINI_API_KEY || ''; in src/modules/llms/server/gemini/gemini.router.ts to:

  let geminiKey: string;
  if (access.geminiKey.includes(',')) {
    // If access.geminiKey includes commas, treat it as a list of keys and choose a random one
    const keys = access.geminiKey.split(',').map(key => key.trim()).filter(key => key.length > 0);
    geminiKey = keys[Math.floor(Math.random() * keys.length)];
  } else {
    // Otherwise, treat it as a single key
    geminiKey = access.geminiKey;
  }