[SC-31576] - Update jit-agent version and Chart version

[psokolinski]

• updates jit-agent version
• updates Chart version

Summary by CodeRabbit

• Chores
  • Bumped jit-k8s-agent chart version to 1.3.1.
  • Updated the default container image tag to 1.3.0 for new installs and upgrades.
• Documentation
  • Updated README to reflect the new default image tag.

These updates align defaults with the latest image and documentation. No other functional changes are included in this release.

[coderabbitai]

Walkthrough

Helm chart metadata version bumped from 1.3.0 to 1.3.1. Default container image tag updated from 1.2.1 to 1.3.0 in values and README. No other fields or logic changed.

Changes

Cohort / File(s)	Summary
Helm chart metadata version charts/jit-k8s-agent/Chart.yaml	Bump chart version 1.3.0 → 1.3.1.
Image tag default updates charts/jit-k8s-agent/values.yaml, charts/jit-k8s-agent/README.md	Update default image.tag 1.2.1 → 1.3.0 (values and documented defaults).

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

I thump my paws—small change, neat and tight,
A tag hops forward, a chart trims its height.
From 1.2.1 to 1.3.0 we go,
Then 1.3.1 the chart will show.
Carrots cached, releases aligned—delight! 🥕✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The title "[SC-31576] - Update jit-agent version and Chart version" clearly summarizes the core change of updating both the agent image tag and the chart metadata. It is concise, specific, and matches the modifications in Chart.yaml, values.yaml, and README.md. Including the ticket ID aids traceability without obscuring the main intent.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch SC-31576

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 99abad8 and cd9faa1.

📒 Files selected for processing (3)

• charts/jit-k8s-agent/Chart.yaml (1 hunks)
• charts/jit-k8s-agent/README.md (1 hunks)
• charts/jit-k8s-agent/values.yaml (1 hunks)

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[ManuelNemirovsky]

LGTM