Improve system detection robustness

- Enhanced detect-system.sh with better SSH options
- Added BatchMode and StrictHostKeyChecking=no for automation
- Increased timeout from 5 to 10 seconds
- Explicit exit codes for clarity

- Improved cert-manager.py detection function:
  - Checks if detect script exists before running
  - Validates return code
  - Checks for empty output
  - Better timeout handling (15 seconds)
  - More detailed error messages
  - Handles TimeoutExpired exception separately

cert-manager.py

@@ -101,14 +101,33 @@ def yes_no_prompt(prompt, default=True):
 def detect_system_type(target_host, script_dir):
     """Detect the type of system on the target host"""
     try:
+        detect_script = script_dir / 'detect-system.sh'
+        if not detect_script.exists():
+            print(f"Warning: detect-system.sh not found at {detect_script}")
+            return 'unknown'
+        
         result = subprocess.run(
-            [str(script_dir / 'detect-system.sh'), target_host],
+            [str(detect_script), target_host],
             capture_output=True,
             text=True,
-            timeout=10
+            timeout=15
         )
+        
+        if result.returncode != 0:
+            print(f"Warning: Detection script returned error code {result.returncode}")
+            if result.stderr:
+                print(f"Error output: {result.stderr}")
+            return 'unknown'
+        
         system_type = result.stdout.strip()
+        if not system_type:
+            print("Warning: Detection script returned empty output")
+            return 'unknown'
+            
         return system_type if system_type in SYSTEM_TYPES else 'unknown'
+    except subprocess.TimeoutExpired:
+        print(f"Warning: System detection timed out for {target_host}")
+        return 'unknown'
     except Exception as e:
         print(f"Warning: Could not detect system type: {e}")
         return 'unknown'