Add organization/site/tags support for machine grouping

- Added organization, site, tags columns to connect_machines table
- Agent now sends org/site/tags from embedded config in AgentStatus
- Server stores org/site/tags metadata in database
- Enables grouping machines by client/site/tag in dashboard

server/src/relay/mod.rs

@@ -313,6 +313,16 @@ async fn handle_agent_connection(
                                 } else {
                                     Some(status.agent_version.clone())
                                 };
+                                let organization = if status.organization.is_empty() {
+                                    None
+                                } else {
+                                    Some(status.organization.clone())
+                                };
+                                let site = if status.site.is_empty() {
+                                    None
+                                } else {
+                                    Some(status.site.clone())
+                                };
                                 sessions_status.update_agent_status(
                                     session_id,
                                     Some(status.os_version.clone()),
@@ -321,6 +331,9 @@ async fn handle_agent_connection(
                                     status.display_count,
                                     status.is_streaming,
                                     agent_version.clone(),
+                                    organization.clone(),
+                                    site.clone(),
+                                    status.tags.clone(),
                                 ).await;
 
                                 // Update version in database if present
@@ -328,8 +341,19 @@ async fn handle_agent_connection(
                                     let _ = crate::db::releases::update_machine_version(db.pool(), &agent_id, version).await;
                                 }
 
-                                info!("Agent status update: {} - streaming={}, uptime={}s, version={:?}",
-                                    status.hostname, status.is_streaming, status.uptime_secs, agent_version);
+                                // Update organization/site/tags in database if present
+                                if let Some(ref db) = db {
+                                    let _ = crate::db::machines::update_machine_metadata(
+                                        db.pool(),
+                                        &agent_id,
+                                        organization.as_deref(),
+                                        site.as_deref(),
+                                        &status.tags,
+                                    ).await;
+                                }
+
+                                info!("Agent status update: {} - streaming={}, uptime={}s, version={:?}, org={:?}, site={:?}",
+                                    status.hostname, status.is_streaming, status.uptime_secs, agent_version, organization, site);
                             }
                             Some(proto::message::Payload::Heartbeat(_)) => {
                                 // Update heartbeat timestamp