chore(logging): add detailed debug logging to instance start and tunnel creation

Add comprehensive logging to trace 500 error:
- Log each step of docker compose up (returncode, stdout, stderr)
- Log container ID and name after start
- Log tool type and port being used
- Log each step of Cloudflare tunnel creation with API responses
- Log cloudflared config updates

This will help identify exactly where the failure occurs.

apps/api/src/services/cloudflare_tunnel.py

@@ -45,11 +45,17 @@ async def create_tunnel(
     if not settings.cloudflare_api_token:
         raise ValueError("CLOUDFLARE_API_TOKEN not configured")
 
+    logger.info("Creating Cloudflare tunnel for instance_name=%s, instance_id=%s, port=%d", 
+                instance_name, instance_id, instance_port)
+    logger.info("Cloudflare config: account_id=%s, zone_id=%s, base_domain=%s",
+                settings.cloudflare_account_id, settings.cloudflare_zone_id, settings.cloudflare_base_domain)
+
     headers = _get_headers(settings)
     account_id = settings.cloudflare_account_id
 
     # Create tunnel
     async with httpx.AsyncClient() as client:
+        logger.info("Step 1: Creating tunnel via Cloudflare API...")
         response = await client.post(
             f"{CLOUDFLARE_API_BASE}/accounts/{account_id}/cfd_tunnel",
             headers=headers,
@@ -58,6 +64,7 @@ async def create_tunnel(
                 "config_src": "cloudflare",
             },
         )
+        logger.info("Tunnel creation response: status=%d, body=%s", response.status_code, response.text[:500])
         response.raise_for_status()
         data = response.json()
 
@@ -66,19 +73,24 @@ async def create_tunnel(
 
         tunnel = data["result"]
         tunnel_id = tunnel["id"]
+        logger.info("Step 1 complete: tunnel_id=%s", tunnel_id)
 
         # Get tunnel token
+        logger.info("Step 2: Getting tunnel token...")
         token_response = await client.get(
             f"{CLOUDFLARE_API_BASE}/accounts/{account_id}/cfd_tunnel/{tunnel_id}/token",
             headers=headers,
         )
+        logger.info("Token response: status=%d", token_response.status_code)
         token_response.raise_for_status()
         token_data = token_response.json()
         tunnel_token = token_data["result"]
+        logger.info("Step 2 complete: got tunnel token")
 
         # Create DNS record for the tunnel
         subdomain = f"instance-{instance_id[:8]}"
         hostname = f"{subdomain}.{settings.cloudflare_base_domain}"
+        logger.info("Step 3: Creating DNS record for subdomain=%s, hostname=%s", subdomain, hostname)
 
         dns_response = await client.post(
             f"{CLOUDFLARE_API_BASE}/zones/{settings.cloudflare_zone_id}/dns_records",
@@ -91,9 +103,12 @@ async def create_tunnel(
                 "proxied": True,
             },
         )
+        logger.info("DNS response: status=%d, body=%s", dns_response.status_code, dns_response.text[:500])
         dns_response.raise_for_status()
+        logger.info("Step 3 complete: DNS record created")
 
         # Update cloudflared config
+        logger.info("Step 4: Updating cloudflared config...")
         await update_cloudflared_config(
             tunnel_id=tunnel_id,
             tunnel_token=tunnel_token,
@@ -102,7 +117,9 @@ async def create_tunnel(
             instance_port=instance_port,
             settings=settings,
         )
+        logger.info("Step 4 complete: cloudflared config updated")
 
+        logger.info("Tunnel creation complete: tunnel_id=%s, public_url=https://%s", tunnel_id, hostname)
         return {
             "tunnel_id": tunnel_id,
             "public_url": f"https://{hostname}",