chore: update Go to version 1.26

[lechnerc77]

Purpose

• Update Go to version 1.26
• Update dependencies to their latest versions
• Update devcontainer to use Go 1.26 image

Does this introduce a breaking change?

[ ] Yes
[X] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[X] Other... Please describe: Go version update and dependency updates

How to Test

• Test the code via automated test

make test

What to Check

Verify that the following are valid:

• Automated tests are executed successfully

Other Information

n/a

Checklist for reviewer

The following organizational tasks must be completed before merging this PR:

• The PR status on the Project board is set (typically "in review").
• The PR has the matching labels assigned to it.
• If the PR closes an issue, the issue is referenced.
• Possible follow-up issues are created and linked.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud