chore: add extraEnv to performance sidecars

[kjubybot-p2p]

Summary by CodeRabbit

• New Features
  • Added optional custom environment variables for performance monitoring deployments, enabling users to configure additional environment settings for performance-related services as needed.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 8dd55b4d-fba9-4b3c-ab28-dfc66fd4134b

📥 Commits

Reviewing files that changed from the base of the PR and between add708d and c1ce66d.

📒 Files selected for processing (1)

• oracle/templates/deployment-performance.tpl

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Walkthrough

This pull request modifies a Helm deployment template to add optional custom environment variables for the performance-collector and performance-web containers by conditionally rendering a new env: section from .Values.extraEnv configuration.

Changes

Cohort / File(s)	Summary
Helm Template Enhancement oracle/templates/deployment-performance.tpl	Adds conditional env: section supporting optional custom environment variables via .Values.extraEnv for both performance containers; existing envFrom behavior preserved.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

🐰 With whiskers twitched and paws at rest,
I've added vars to pass the test!
Environment knobs, both great and small,
Now customizable for one and all! 🌱

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'chore: add extraEnv to performance sidecars' accurately describes the main change: adding extraEnv support to performance sidecar containers.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/extra-env

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