chore: upgrade Go to 1.27.3 and Atlas to 1.3.4 - #3677

Kusari Analysis Results:

✅ No Flagged Issues Detected
All values appear to be within acceptable risk parameters.

Dependency analysis found the stdlib patch bump from 1.27.2 to 1.27.3 to be a low-risk update of an official Go team dependency: no advisories, no old-version vulnerabilities, no blocked, deprecated, or end-of-life flags, and a permissive BSD-3-Clause license. The missing scorecard data and the 'latest version not found' note are expected for stdlib and do not indicate risk. Code analysis found no code issues, exposed secrets, or workflow issues. Combined, the findings do not change the risk profile and no action is required.

@kusari-inspector rerun - Trigger a re-analysis of this PR
@kusari-inspector feedback [your message] - Send feedback to our AI and team
See Kusari's documentation for setup and configuration.
Commit: 27c409f, performed at: 2026-10-20T23:04:40Z