Add info-level logging to contact handler for debugging

Change debug logging to info level so contact processing is visible
in default log output. This helps verify that contact events are
being received and processed correctly.

src/meshcore_hub/collector/handlers/contacts.py

@@ -47,6 +47,8 @@ def handle_contact(
     # Device uses 'adv_name' for the advertised name
     name = payload.get("adv_name") or payload.get("name")
 
+    logger.info(f"Processing contact: {contact_key[:12]}... adv_name={name}")
+
     # Device uses numeric 'type' field, convert to string
     raw_type = payload.get("type")
     if raw_type is not None:
@@ -64,12 +66,14 @@ def handle_contact(
         if node:
             # Update existing node - always update name if we have one
             if name and name != node.name:
-                logger.debug(f"Updating node {contact_key[:12]}... name: {name}")
+                logger.info(
+                    f"Updating node {contact_key[:12]}... "
+                    f"name: {node.name!r} -> {name!r}"
+                )
                 node.name = name
             if node_type and not node.adv_type:
                 node.adv_type = node_type
             node.last_seen = now
-            logger.debug(f"Updated contact: {contact_key[:12]}... ({name})")
         else:
             # Create new node
             node = Node(