fix(chart): cast metadata.id to string for regexMatch in physical_links_info (#110)

After the metadata extraction refactor in 2b5746e, metadata fields are
stored as interface{} in map[string]interface{}. The regexMatch Sprig
function strictly requires a string argument, causing template rendering
to fail with "expected string; got interface {}".

Signed-off-by: Andrei Kvapil <kvapss@gmail.com>
Co-authored-by: Claude <noreply@anthropic.com>

Author: kvaps

charts/talm/templates/_helpers.tpl

@@ -85,7 +85,7 @@
 {{- define "talm.discovered.physical_links_info" }}
 # -- Discovered interfaces:
 {{- range (lookup "links" "" "").items }}
-{{- if and .spec.busPath (regexMatch "^(eno|eth|enp|enx|ens)" .metadata.id) }}
+{{- if and .spec.busPath (regexMatch "^(eno|eth|enp|enx|ens)" (.metadata.id | toString)) }}
 # {{ .metadata.id }}:
 #   hardwareAddr:{{ .spec.hardwareAddr }}
 #   busPath: {{ .spec.busPath }}