style: clear whitespace, unused-import and blank-line lint

Strip trailing whitespace, drop unused imports/variables/global statements,
split multi-imports, fix E3xx/E1xx spacing and E712 comparisons. No behaviour
change; only E501 long lines remain in flake8.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

hbd/client/plugins/nagios_runner.py

@@ -43,10 +43,10 @@ STATUS_NAMES = {
 
 class NagiosRunnerPlugin(MonitorPlugin):
     """Run Nagios-compatible monitoring plugins.
-    
+
     This plugin executes external Nagios plugins and collects their output,
     including status codes, messages, and performance data.
-    
+
     Configuration:
         interval: Collection interval in seconds (default: 300)
         commands: List of command definitions with 'name' and 'command' keys
@@ -62,20 +62,20 @@ class NagiosRunnerPlugin(MonitorPlugin):
             - name: check_load
               command: /usr/lib/nagios/plugins/check_load -w 5,4,3 -c 10,8,6
     """
-    
+
     name = "nagios_runner"
     version = "1.0.0"
     description = "Execute Nagios-compatible monitoring plugins"
     interval = 300  # MonitorPlugin: collect every 5 minutes by default
-    
+
     def __init__(self, config: Optional[Dict[str, Any]] = None):
         super().__init__(config)
-        
+
         # Extract configuration
         self.commands: List[Dict[str, str]] = config.get("commands", []) if config else []
         self.timeout: int = config.get("timeout", 30) if config else 30
         self.interval = config.get("interval", 300) if config else 300
-    
+
     async def initialize(self) -> bool:
         """Initialize the Nagios runner plugin.
 
@@ -117,10 +117,10 @@ class NagiosRunnerPlugin(MonitorPlugin):
                     )
 
         return True
-    
+
     async def _collect_metrics(self) -> Dict[str, Any]:
         """Collect metrics from all configured Nagios plugins.
-        
+
         Returns:
             Dictionary with results from all plugins
         """
@@ -159,7 +159,7 @@ class NagiosRunnerPlugin(MonitorPlugin):
                 results[f"{name}_output"] = str(e)
 
         return results
-    
+
     async def _run_nagios_plugin(
         self,
         command: str
@@ -210,33 +210,33 @@ class NagiosRunnerPlugin(MonitorPlugin):
         except Exception as e:
             self.logger.error(f"Error executing command: {e}")
             return NAGIOS_UNKNOWN, f"Execution error: {str(e)}", {}
-    
+
     def _parse_perfdata(self, output: str) -> Dict[str, Any]:
         """Parse Nagios performance data from plugin output.
-        
+
         Nagios performance data format:
         'label'=value[UOM];[warn];[crit];[min];[max]
-        
+
         Multiple metrics separated by spaces.
-        
+
         Args:
             output: Plugin output string
-            
+
         Returns:
             Dictionary of metric_name: value
         """
         perfdata = {}
-        
+
         # Performance data comes after the pipe character
         if '|' not in output:
             return perfdata
-        
+
         perf_section = output.split('|', 1)[1].strip()
-        
+
         # Regex to match performance data format
         # Matches: 'label'=value or label=value
         perf_regex = r"'?([^'=]+)'?=([\d.]+)([a-zA-Z%]*);?([\d.]*);?([\d.]*);?([\d.]*);?([\d.]*)"
-        
+
         for match in re.finditer(perf_regex, perf_section):
             label = match.group(1).strip()
             value_str = match.group(2)
@@ -245,43 +245,43 @@ class NagiosRunnerPlugin(MonitorPlugin):
             crit = match.group(5)
             min_val = match.group(6)
             max_val = match.group(7)
-            
+
             # Convert value to float
             try:
                 value = float(value_str)
             except ValueError:
                 continue
-            
+
             # Store the value
             perfdata[label] = value
-            
+
             # Optionally store UOM as separate field
             if uom:
                 perfdata[f"{label}_uom"] = uom
-            
+
             # Store thresholds if present
             if warn:
                 try:
                     perfdata[f"{label}_warn"] = float(warn)
                 except ValueError:
                     pass
-            
+
             if crit:
                 try:
                     perfdata[f"{label}_crit"] = float(crit)
                 except ValueError:
                     pass
-            
+
             if min_val:
                 try:
                     perfdata[f"{label}_min"] = float(min_val)
                 except ValueError:
                     pass
-            
+
             if max_val:
                 try:
                     perfdata[f"{label}_max"] = float(max_val)
                 except ValueError:
                     pass
-        
+
         return perfdata