Remove hardcoded Redis URL from conversation-runner.php

- Let index.php handle REDIS_URL from .env
- No need to pass it through subprocess environment

conversation-runner.php

@@ -7,9 +7,11 @@
  * 
  * Usage: php conversation-runner.php
  * 
- * Environment variables (optional):
+ * Environment variables (passed to index.php):
  *   API_BASE_URL        — Override endpoint (default: from conversation file)
  *   MAX_CONTEXT_TOKENS  — Override context limit (default: from conversation file)
+ * 
+ * Note: REDIS_URL, VLLM_URL, etc. are read from .env by index.php
  */
 
 require __DIR__ . '/vendor/autoload.php';
@@ -22,9 +24,6 @@ use ContextPaging\TokenCounter;
 
 $conversationFile = __DIR__ . '/conversations/coding-session.json';
 
-// Redis URL for caching (optional but recommended for persistence)
-$redisUrl = getenv('REDIS_URL') ?: 'REDIS_URL_FROM_ENV';
-
 // -----------------------------------------------------
 // Load conversation state
 // -----------------------------------------------------
@@ -138,7 +137,6 @@ $indexPhp = __DIR__ . '/index.php';
 $env = [
     'API_BASE_URL' => $conversation['endpoint'],
     'MAX_CONTEXT_TOKENS' => (string) $conversation['max_context'],
-    'REDIS_URL' => $redisUrl,
 ];
 
 // Build the command