chore: add Dependabot cooldown (~3 days)

[MitaliBhalla]

Summary

• Add Dependabot cooldown.default-days: 3 for gomod and docker updates
• Aligns Path B version updates with MintMaker minimumReleaseAge (~3 days) for supply-chain delay
• Does not change schedule, auto-merge workflow, or security-update behavior

Test plan

• Confirm dependabot.yml validates in GitHub Dependabot settings / next Dependabot run
• Confirm only cooldown was added (no other config drift)

Made with Cursor

Summary by CodeRabbit

• Chores
  • Updated automated dependency update settings to add a three-day cooldown before proposals are made.
  • Improved linting reliability by running module downloads before lint checks.
  • Increased lint execution timeout to 15 minutes and adjusted golangci-lint concurrency to better utilize available capacity.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 9007765e-5809-4806-ac26-d829288a42d9

📥 Commits

Reviewing files that changed from the base of the PR and between 4bd416e and 6f15c1f.

📒 Files selected for processing (2)

• .golangci.yml
• Makefile

🚧 Files skipped from review as they are similar to previous changes (1)

• .golangci.yml

---

Walkthrough

Dependabot Docker and Go module updates now use a three-day cooldown. golangci-lint is configured for two-way concurrency and fifteen-minute runs, while the Makefile downloads Go modules before linting.

Changes

Dependency and lint configuration

Layer / File(s)	Summary
Dependabot cooldowns .github/dependabot.yml	Docker and Go module update entries add cooldown.default-days: 3 with MintMaker alignment comments.
Lint execution settings .golangci.yml, Makefile	golangci-lint concurrency is set to 2, timeout is set to 15m, and the Makefile downloads Go modules before running lint with a 15m timeout.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: smarthall, wanghaoran1988

🚥 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 clearly matches the main change: adding a roughly 3-day Dependabot cooldown.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: MitaliBhalla

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 54.54%. Comparing base (76dbde8) to head (6f15c1f).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #977   +/-   ##
=======================================
  Coverage   54.54%   54.54%           
=======================================
  Files          82       82           
  Lines        6308     6308           
=======================================
  Hits         3441     3441           
  Misses       2417     2417           
  Partials      450      450           

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[MitaliBhalla]

/test pull-ci-openshift-backplane-cli-main-lint

[MitaliBhalla]

/test lint

[MitaliBhalla]

/retest

[MitaliBhalla]

/test lint

[openshift-ci]

@MitaliBhalla: all tests passed!

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