Up golang and fix linter issues

[iKimi4]

• Updated base docker image to use Go 1.26 to fix security issues, such as CVE-2025-68121, CVE-2025-47906
• Fix golangci-lint issues

[coderabbitai]

Summary by CodeRabbit

• Chores
  • Updated build infrastructure to use Go 1.26
  • Improved code quality through internal refactoring and test formatting

Walkthrough

The changes upgrade the Go build environment version in Docker from 1.23 to 1.26, modernize reflection API usage in configuration tests by replacing reflect.TypeOf() with reflect.TypeForT, and add formatting consistency to test initialization code.

Changes

Cohort / File(s)	Summary
Reflection API Modernization config_test.go	Updated clearConfigEnv to use reflect.TypeFor[config]() instead of reflect.TypeOf(cfg), eliminating the temporary zero-value variable while preserving field iteration logic.
Build Environment linux/Dockerfile	Updated base Go image from golang:1.23-alpine3.22 to golang:1.26-alpine3.22 for the build stage.
Test Formatting reaper_test.go	Added blank lines after slice initialization in TestReapContainer, TestReapNetwork, TestReapVolume, and TestReapImage for improved code nesting consistency.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 Reflection blooms with generic grace,
Go versions march at quickened pace,
Tests find breathing room to rest,
Each tiny change, a small behest!

🚥 Pre-merge checks | ✅ 1 | ❌ 2

❌ Failed checks (1 warning, 1 inconclusive)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 20.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.
Description check	❓ Inconclusive	No description was provided, which makes it impossible to assess if it relates to the changeset.	Add a description explaining the purpose of the changes and why the Go version was bumped from 1.23 to 1.26.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main changes: updating Go version and fixing linter issues, which align with the file changes (Go 1.23→1.26, code formatting).

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✨ Finishing Touches

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📝 Coding Plan

• Generate coding plan for human review comments

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[coderabbitai]

🧹 Nitpick comments (1)

linux/Dockerfile (1)

4-4: Pin the Go build image by digest for reproducible builds.

The mutable tag golang:1.26-alpine3.22 can shift to different image contents over time. Pin it with the resolved digest:

Proposed change

-FROM golang:1.26-alpine3.22 AS build
+FROM golang:1.26-alpine3.22@sha256:07e91d24f6330432729082bb580983181809e0a48f0f38ecde26868d4568c6ac AS build

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@linux/Dockerfile` at line 4, Replace the mutable base image reference in the
Dockerfile's FROM line (currently "golang:1.26-alpine3.22") with the exact image
digest to pin the build image; update the FROM instruction to use the resolved
sha256 digest for golang:1.26-alpine3.22 so the build is reproducible (obtain
the digest via docker pull or registry lookup and substitute it in the FROM
line).

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In `@linux/Dockerfile`:
- Line 4: Replace the mutable base image reference in the Dockerfile's FROM line
(currently "golang:1.26-alpine3.22") with the exact image digest to pin the
build image; update the FROM instruction to use the resolved sha256 digest for
golang:1.26-alpine3.22 so the build is reproducible (obtain the digest via
docker pull or registry lookup and substitute it in the FROM line).

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 5b1933f1-5c79-494b-a839-04ddfe69660e

📥 Commits

Reviewing files that changed from the base of the PR and between 7c9b3b7 and 2b77127.

📒 Files selected for processing (3)

• config_test.go
• linux/Dockerfile
• reaper_test.go

[iKimi4]

@coderabbitai Fixed description