chore(helm): add nameOverride and fullnameOverride value placeholders

[fabriziosestito]

Description

Add nameOverride and fullnameOverride value placeholders to values.yaml.

[Copilot]

Pull request overview

Adds Helm chart value placeholders for controlling generated resource naming, aligning values.yaml with existing helper template support for nameOverride/fullnameOverride.

Changes:

• Introduce nameOverride and fullnameOverride keys in charts/sbomscanner/values.yaml with explanatory comments.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 53.46%. Comparing base (da05923) to head (b5d1d11).
⚠️ Report is 10 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1095   +/-   ##
=======================================
  Coverage   53.46%   53.46%           
=======================================
  Files          61       61           
  Lines        5323     5323           
=======================================
  Hits         2846     2846           
  Misses       2081     2081           
  Partials      396      396           

Flag	Coverage Δ
unit-tests	53.46% <ø> (ø)

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