ci: add CI workflow for release-1.3

[kdacosta0]

Summary

Backport ci.yml (lint + unit tests) from main so that PRs targeting release branches get CI coverage. Without this, PRs merged with no checks (as seen with PR #84).

Changes from main:

• ci.yml: golangci-lint pinned to v1.64.8 (release branches use v1 config format)
• .golangci.yml: disable errname, intrange, perfsprint and exclude gosec G115 (not enabled on main v2 config either)

Note: e2e.yml not included — the operator on release-1.3 fails to start in Kind with no matches for kind "Ingress" in version "config.openshift.io/v1" (requires OpenShift-specific CRDs not available in Kind).

Test plan

• CI workflow self-triggers on this PR
• Lint passes with v1 config
• Unit tests pass

🤖 Generated with Claude Code

[qodo-for-securesign]

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[qodo-for-securesign]

PR Summary by Qodo

ci: backport CI and E2E workflows to release-1.3

⚙️ Configuration changes 🕐 Less than 10 minutes

AI Description

• Adds ci.yml (lint + unit tests) and e2e.yml (full E2E) GitHub Actions workflows, backported
 from main.
• Fixes the gap where PRs targeting release branches previously got no CI coverage.
• Pins golangci-lint to v1.55.2 to match the v1 config format used on release branches.
• Defaults OPERATOR_REF to release-1.3 for the E2E workflow's operator checkout.

Diagram

graph TD
  A([PR / Push Event]) --> B{Target Branch}
  B --> C[[ci.yml]]
  B --> D[[e2e.yml]]
  C --> E[Lint golangci-lint v1.55.2]
  C --> F[Unit Tests go test]
  D --> G[Checkout operator release-1.3]
  D --> H[Kind Cluster + Deploy Operator]
  H --> I[Run E2E Tests]

  subgraph Legend
    direction LR
    _wf[[Workflow]] ~~~ _step[Step/Job] ~~~ _ev([Event])
  end

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High-Level Assessment

Backporting the existing main-branch workflows with minimal, targeted adjustments (lint version pin, default operator ref) is the correct and lowest-risk approach for restoring CI coverage on the release branch; no alternative architecture is warranted for this change.

Files changed (2) +192 / -0

Other (2) +192 / -0

ci.ymlAdd CI workflow with lint and unit test jobs +44/-0

Add CI workflow with lint and unit test jobs

• New GitHub Actions workflow that runs golangci-lint (pinned to v1.55.2 for v1 config compatibility) and Go unit tests on pull requests and pushes to main/release branches.

.github/workflows/ci.yml

e2e.ymlAdd E2E workflow defaulting to release-1.3 operator ref +148/-0

Add E2E workflow defaulting to release-1.3 operator ref

• New GitHub Actions workflow that provisions a Kind cluster, deploys the operator, installs SecureSign, and runs the full E2E test suite; defaults OPERATOR_REF to release-1.3 and supports manual dispatch overrides.

.github/workflows/e2e.yml