fix: properly pass env vars to cached tools and add extensive logging

PROBLEM:
- Tool wrappers cached env vars in closure, so cached tools used stale env
- Client env vars weren't reaching Railway executor even when provided
- No visibility into env var flow through the system

SOLUTION:
1. Store env vars per conversation in conversationEnv Map
2. Tool execute functions look up latest env from Map (not closure)
3. Chat API calls setConversationEnv() on each request
4. Added logging at every step

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

apps/railway-executor/server.ts

@@ -173,6 +173,14 @@ async function executeTool(req: Request): Promise<Response> {
     const body = await req.json();
     const { packageName, exportName, version, importUrl, params, env } = body;
 
+    console.log(`📥 Execute request:`, {
+      packageName,
+      exportName,
+      version,
+      envKeys: env ? Object.keys(env) : [],
+      envValues: env || {},
+    });
+
     if (!packageName || !exportName || !version) {
       return Response.json(
         {
@@ -220,8 +228,15 @@ async function executeTool(req: Request): Promise<Response> {
         console.log(`🔐 Injecting ${envKeys.length} environment variables:`, envKeys);
         for (const [key, value] of Object.entries(env)) {
           Deno.env.set(key, String(value));
+          console.log(`  ✅ Set ${key} = ${String(value).substring(0, 10)}...`);
         }
+        // Verify they're set
+        console.log(`🔍 Verification - Deno.env has:`, envKeys.map(k => `${k}=${Deno.env.get(k)?.substring(0, 10)}...`));
+      } else {
+        console.log(`⚠️  No env vars provided in request`);
       }
+    } else {
+      console.log(`⚠️  No env object in request body`);
     }
 
     // Execute the tool