[PATCH common 1/3] inotify: add helper to resolve 'localhost' node alias

[Elias Huhsovitz <e.huhsovitz@proxmox.com>]

Several API endpoints accept 'localhost' as a valid node alias via the
API routing layer. However, the endpoint handlers often use the literal
string 'localhost' to construct file paths in the cluster filesystem
(e.g., /etc/pve/nodes/localhost/config), which fails because no actual
node directory with that name exists.

Add a PVE::INotify::resolve_nodename() helper to centralize the
translation of 'localhost' to the actual node name. This ensures
consistent behavior. across multiple API handlers.

Signed-off-by: Elias Huhsovitz <e.huhsovitz@proxmox.com>
---
 src/PVE/INotify.pm | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/PVE/INotify.pm b/src/PVE/INotify.pm
index 53b4e21..25ea0b8 100644
--- a/src/PVE/INotify.pm
+++ b/src/PVE/INotify.pm
@@ -533,6 +533,11 @@ sub nodename {
     return $cached_nodename;
 }
 
+sub resolve_nodename {
+    my ($node) = @_;
+    return $node eq 'localhost' ? nodename() : $node;
+}
+
 sub read_etc_hostname {
     my ($filename, $fd) = @_;
 
-- 
2.47.3