Implement user-stopped service tracking system

Add comprehensive tracking for services stopped via dashboard to prevent
false alerts when users intentionally stop services.

Features:
- User-stopped services report Status::Ok instead of Warning
- Persistent storage survives agent restarts
- Dashboard sends UserStart/UserStop commands
- Agent tracks and syncs user-stopped state globally
- Systemd collector respects user-stopped flags

Implementation:
- New service_tracker module with persistent JSON storage
- Enhanced ServiceAction enum with UserStart/UserStop variants
- Global singleton tracker accessible by collectors
- Service status logic updated to check user-stopped flag
- Dashboard version now uses CARGO_PKG_VERSION automatically

Bump version to v0.1.43

agent/src/collectors/systemd.rs

@@ -8,6 +8,7 @@ use tracing::debug;
 
 use super::{Collector, CollectorError};
 use crate::config::SystemdConfig;
+use crate::service_tracker::UserStoppedServiceTracker;
 
 /// Systemd collector for monitoring systemd services
 pub struct SystemdCollector {
@@ -353,11 +354,19 @@ impl SystemdCollector {
         Ok((active_status, detailed_info))
     }
 
-    /// Calculate service status
-    fn calculate_service_status(&self, active_status: &str) -> Status {
+    /// Calculate service status, taking user-stopped services into account
+    fn calculate_service_status(&self, service_name: &str, active_status: &str) -> Status {
         match active_status.to_lowercase().as_str() {
             "active" => Status::Ok,
-            "inactive" | "dead" => Status::Warning,
+            "inactive" | "dead" => {
+                // Check if this service was stopped by user action
+                if UserStoppedServiceTracker::is_service_user_stopped(service_name) {
+                    debug!("Service '{}' is inactive but marked as user-stopped - treating as OK", service_name);
+                    Status::Ok
+                } else {
+                    Status::Warning
+                }
+            },
             "failed" | "error" => Status::Critical,
             "activating" | "deactivating" | "reloading" | "start" | "stop" | "restart" => Status::Pending,
             _ => Status::Unknown,
@@ -480,7 +489,7 @@ impl Collector for SystemdCollector {
         for service in &monitored_services {
             match self.get_service_status(service) {
                 Ok((active_status, _detailed_info)) => {
-                    let status = self.calculate_service_status(&active_status);
+                    let status = self.calculate_service_status(service, &active_status);
 
                     // Individual service status metric
                     metrics.push(Metric {