Fix serviceAccount.automount: false being ignored

[alix-graylog]

Problem

Setting serviceAccount.automount: false had no effect due to a Helm template idiom where | default true treats false as empty. This is a security issue - token automounting could not be disabled even when explicitly configured.

Fixes

• [B-01] serviceAccount automount flag not respected in ServiceAccount templates #117

Solution

Replace the | default true pattern with explicit string comparison to properly handle false values:

if eq (.Values.serviceAccount.automount | toString) "false" }}false{{ else }}true{{ end }}

Changes

- Fix serviceAccount.automount in auth/sa.yaml
- Fix mongodb.serviceAccount.automount in auth/mongo-sa.yaml

Verification: Tested rendering with automount: false, automount: true, and unset — all produce correct behavior.