feat: enable having get variable from local setup

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/churn/src/agent/config.rs

@@ -8,6 +8,8 @@ use uuid::Uuid;
 pub struct AgentConfig {
     pub agent_id: String,
     pub discovery: String,
+
+    pub labels: BTreeMap<String, String>,
 }
 
 impl AgentConfig {
@@ -17,6 +19,7 @@ impl AgentConfig {
         Ok(Self {
             agent_id: config.agent_id,
             discovery: config.discovery,
+            labels: config.labels.unwrap_or_default(),
         })
     }
 }