fix: add :gitSignOff preset to Renovate config

[HemalathaMadeswaran18]

Closes #333

Purpose / Description

Renovate-generated PRs are failing the DCO sign-off check because the Renovate config is missing the :gitSignOff preset. This causes all automated dependency update PRs to be blocked by CI.

Fixes

• Fixes Add missing "extends": ["config:recommended", ":gitSignOff"] to Renovate config #333

Approach

Added :gitSignOff to the extends array in renovate.json. This is Renovate's built-in preset that appends a Signed-off-by: line to every commit it generates, satisfying the DCO check.

Before: "extends": ["config:recommended"]
After: "extends": ["config:recommended", ":gitSignOff"]

How Has This Been Tested?

• Validated JSON syntax
• Confirmed :gitSignOff is a documented Renovate preset: https://docs.renovatebot.com/presets-default/#gitsignoff
• Once merged, Renovate will rebase its open PRs with signed-off commits, which can be verified by checking the DCO status on existing Renovate PRs

Learning (optional, can help others)

• Renovate's :gitSignOff preset uses the commitBody option under the hood to append Signed-off-by: ... to all commits
• Docs: https://docs.renovatebot.com/configuration-options/#commitbody
• Preset reference: https://docs.renovatebot.com/presets-default/#gitsignoff

Checklist

• All commits are signed off (git commit -s) per the DCO
• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: N/A — config-only change

[Haz3-jolt]

Idk the legality of renovate doing DCO but sure